Need help in Python multiplication

Question

I'm new to python and need your help in this issue. Tried looking everywhere but didn't find any working solution.

My code is:

a=input("Enter a number : ")
b=10
c=a*b
print("Multiply =",c)

The output I'm getting for a=2 is:

Multiply = 2222222222 

I want it to print Multiply = 20 but instead it is printing 10 times the digit 1, but I want the product. How do i solve this?

Answer 1

By default, input() returns a string. Using

a = int(input("Enter a number: "))

Should work.

Answer 2

You can't multiply a string. I like to think of it as 10*'word'. Possible but won't get you an output.

a=int(input("Enter a number : "))
b=10
c=a*b
print("Multiply =",c)

Take an int input.

• Ted Klein Bergman: You can multiply a string though. It'll just repeat the string b amount of times, which is what happened to the asker.
• Thavas Antonio: Yes I know.I said this is possible. But your output is incorrect

Answer 3

You need to convert the input to an integer using something like int(input("Enter a number : ")) but if the input is not an integer that will cause issues.

To make sure the input is a string I recommend something like this:

while True:
 a = input("Enter a number : ")
 if a.isnumeric():
 a = int(a)
 break
 print("You did not input a number.")
 
b = 10
c = a * b
print("Multiply =",c)

This will loop until the user gives a number.

Answer 4

You Can Use float to add integer or float as input.

print("Multiply =", float(input("Enter a number : "))*10)

int1: 5
int2: 5.5
out1: 50.0
out2: 55.0

Or:

print("Multiply =", int(float(input("Enter a number : "))*10))

int1: 5
int2: 5.5
out1: 50
out2: 55

Answer 5

Input takes string. So first of all convert it to integer by calling int() function

a = int(input("Enter a number : "))
b = 10
c = a*b
print("Multiply =",c)

Answer 6

Remember in python input() function always returns string so when you need any certain data type as your input type cast accordingly, Here are few Examples

x = int(input()) # input 20 
print(x) -> prints 20 
x = float(input()) # input 50 
 
print(x) -> prints 50.0
x = list(map(int, input().split(' '))) # input 20 30 40 as integer 
print(x) -> prints list [20, 30, 40]
so the solution for your question is:
 
a=int(input("Enter a number : "))
b=10
c=a*b
print("Multiply =",c)