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Commit 8962882

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‎Check-Prime/All-Prime-Numbers.md‎

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# 7.2 All Prime Numbers
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## the problem
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Ask the user to enter a number. Then find all the primes up to that number.
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## Hints
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You can use the previous is_prime function that you created in the previous problem. Now create a new function named all_primes. In that function, run a for loop.
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For each number, call the is_prime function. If the return is True to add it in the prime list.
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## The Solution
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```python
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def is_prime(num):
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for i in range(2,num):
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if (num % i) == 0:
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return False
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return True
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def all_primes(num):
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primes = []
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for n in range(2,num+1):
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if is_prime(n) is True:
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primes.append(n)
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return primes
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num = int(input("Enter upper limit: "))
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primes = all_primes(num)
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print(primes)
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```
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**[Try it on Programming Hero](https://play.google.com/store/apps/details?id=com.learnprogramming.codecamp)**
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## Explanation
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The first one is the is_prime that you have seen before. Now we created another function named all_primes. In the all_primes function, we create a list named primes to hold the prime numbers. Then run a for loop using range.
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The range starts at 2 and runs until num+1 so that it goes until num. We are starting at 2. Because 2 is the first prime number.
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Inside the loop, call the is_prime function and check the return. If the return is True then append the n in the primes list.
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Then return the primes list.
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That’s it.

‎Check-Prime/Prime-Factors.md‎

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# Prime Factors
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## The problem
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Ask the user to enter a number. Then find all the primes factors for the number.
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## Hints
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A prime factor is a prime number that could divide a number.
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For example, if you think about the number 35. It has two prime factors: 5 and 7.
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Both 5 and 7 are prime numbers. And they can divide the number 35.
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Similarly, for the number 10, you will have two factors 2 and 5.
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To find the factor, you will run a while loop.
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Before the loop, add an empty list to store the prime number. And a variable named divisor whose starting value is 2.
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In the loop, you will start dividing with the number by the divisor. If the number gets divided, add it in the factors list.
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If it is not divided, increase the divisor by 1.
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## The Solution
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```python
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def get_prime_factors(n):
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factors = []
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divisor = 2
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while n > 2:
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if(n % divisor == 0):
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factors.append(divisor)
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n = n / divisor
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else:
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divisor = divisor + 1
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return factors
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num = int (input('Enter your number: '))
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factors = get_prime_factors(num)
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print(factors)
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```
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**[Try it on Programming Hero](https://play.google.com/store/apps/details?id=com.learnprogramming.codecamp)**
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## take Away
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Prime factor is a prime number that divides the provided number.
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‎Check-Prime/Prime-Numbers.md‎

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## 7.1 Check Prime:
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# 7.1 Check Prime:
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### The problem
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## The problem
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For a given number, check whether the number is a prime number or not.
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### Hint
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## Hint
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A number is a prime number. If that number is only divisible by 1 and the number itself.
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This means a prime number is not divisible by any numbers between 1 and the number itself.
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So, to check prime, you can start dividing the number from 2. And then increase it by 1. If the number gets divided, then it’s not a prime number.
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### The solution
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## The solution
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```python
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def is_prime(num):
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print('Your number is not a Prime')
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```
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[Try it on Programming Hero button]
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**[Try it on Programming Hero](https://play.google.com/store/apps/details?id=com.learnprogramming.codecamp)**
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### Explanation
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The core part of the algorithm is the is_prime function.
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Then we will return True. Because it didn’t get divided, by any numbers. Hence, it will be a prime number.
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### Many Solution
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## Many Solution
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There are other solutions to this problem as well. We encourage you to google, "check prime number python". In that way, you will learn a lot.
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### Take Away
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## Take Away
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A prime number is only divisible by 1 and the number itself.
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# Smallest prime factor [premium]
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## The problem
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Find the smallest prime factor for the given number.
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## Solution Hint
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After finishing all the prime factors, this will be a piece of cake for you.
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## Solution
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```python
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def get_smallest_factor(num):
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factor = 2
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while num % factor != 0:
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factor += 1
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return factor
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num = int(input('Enter your number: '))
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smallest_factor = get_smallest_factor(num)
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print('The smallest prime factor is: ', smallest_factor)
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```
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## Explanation
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Since we need only one factor. We can do it more easily.
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Just run a while loop. The condition of the loop is checking the remainder. If there is no remainder, the number got divided and you got the prime factor. If the remainder is not 0, then increase the factor by one.

‎Computations/Calculate-Grades.md‎

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## 6.3 Calculate grades
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# 6.3 Calculate grades
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### The problem
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## The problem
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Calculate grade of five subjects.
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### Hint
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## Hint
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So, you have to take five inputs. These will be the marks of five subjects. Then, create the average.
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Once you have the average. It just running an if-else. And decide the grade.
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### The Solution
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## The Solution
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```python
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print('Enter your marks:')
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sub1=int(input("First subject: "))
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```
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**[Try it on Programming Hero](https://play.google.com/store/apps/details?id=com.learnprogramming.codecamp)**
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### Explanation
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## Explanation
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Calculation of average is easy. Add them all and then divide by the count. As we are taking numbers for 5 subjects we are dividing the total by 5.
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After that, we are running a simple if-else to determine the grade.

‎Computations/Complex-Interest.md‎

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## 6.2: Compound Interest
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# 6.2: Compound Interest
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### The Problem
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## The Problem
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Take money borrowed, interest and duration as input. Then, compute the compound interest rate.
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### Hint
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Here, P is the principal amount; it is the amount that you borrowed. r is the interest rate in percentage and t is the time.
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### Solution
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## Solution
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```python
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def compound_interest(principle, rate, time):
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**[Try it on Programming Hero](https://play.google.com/store/apps/details?id=com.learnprogramming.codecamp)**
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### Explanation
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## Explanation
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Inside the function, just look into the power calculation.
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**(1 + rate / 100) time**
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Rest of the part should be easy for you.
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### Take Away
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## Take Away
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To apply the same power on multiple things, put them inside parentheses and then apply the power.
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‎Computations/Gravitational-Force.md‎

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## 6.4 Gravitational Force
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# 6.4 Gravitational Force
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### The Problem
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## The Problem
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Compute gravitational force between two objects.
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### Hint
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## Hint
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The formula for gravitational force is
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**F = G m1m2/r2**
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So, take three input from the users. The mass of the first object, the mass of the second object and the distance between them.
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### Solution
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## Solution
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```python
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mass1 = float(input("First mass: "))
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**[Try it on Programming Hero](https://play.google.com/store/apps/details?id=com.learnprogramming.codecamp)**
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### Explanation
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## Explanation
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The calculation is simple. Only two things need to be learned from this.
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**Have a look, how we wrote 6.673*10-11**

‎Computations/Simple-Interest.md‎

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## 6.1: Simple Interest
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# 6.1: Simple Interest
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---
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### The Problem
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## The Problem
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You borrowed 5000ドル for 2 years with 2% interest per year.
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Calculate the simple interest to know how much you have to pay?
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### Hint
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## Hint
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Just take amount, duration and interest rate.
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You have to multiply these three. And, don’t forget: you have to convert percent to a fraction by dividing it by 100.
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### The Solution
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## The Solution
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```python
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principle = int(input("Money you borrowed: "))
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**[Try it on Programming Hero](https://play.google.com/store/apps/details?id=com.learnprogramming.codecamp)**
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### Explanation
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## Explanation
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Read the code. I think you don’t need any extra explanation here.
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‎Computations/Triangle-Area.md‎

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## Triangle Area
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---
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### The Problem
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# The problem
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Take three sides of a triangle. And then calculate the area of the triangle.
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### How it works
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## How it works
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To calculate the area of the triangle. First, calculate the half of the perimeter. Here perimeter is the sum of each side of the triangle.
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Let’s call it s.
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area = √(s(s-a)*(s-b)*(s-c))
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### the code
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## the code
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```python
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import math
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```
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**[Try it on Programming Hero](https://play.google.com/store/apps/details?id=com.learnprogramming.codecamp)**
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### Explanation
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## Explanation
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To calculate the square root. We used the math module. And call math.sqrt.
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```python
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This is something new you have learned this time.
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### Quiz
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## Quiz
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How would you calculate the square root of a number.
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1. Use math.square.root
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<p>The answer is: 3</p>
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</details>
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### Take Away
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##take Away
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The math module has a lot of math-related functionalities.
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‎Conversions/Celsius-to-Fahrenheit.md‎

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## 4.2 Celsius to Fahrenheit
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# 4.2 Celsius to Fahrenheit
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### The problem
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## The problem
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Take the temperature in degrees Celsius and convert it to Fahrenheit.
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<details>
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<summary><b>S-2: Click Here For Show Hints</b></summary>
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<p>To convert degrees Celsius temperature to Fahrenheit, you have to multiply by 9 and divide by 5.
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## Hins:
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To convert degrees Celsius temperature to Fahrenheit, you have to multiply by 9 and divide by 5.
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And then, add 32.</p>
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</details>
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And then, add 32.
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Think for a second...How will you multiply a variable by 9 and then divide by 5? and then add 32. Can you do it without looking at the solution?
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### The solution
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## The solution
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```python
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celsius = float(input("Enter temperature in degrees Celsius: "))
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