JavaScript: Compute the value of bn where n is the exponent and b is the bases

JavaScript Function: Exercise-15 with Solution

Compute Power (bn)

Write a JavaScript function to compute the value of bn where n is the exponent and b is the base. Accept b and n from the user and display the results.

Sample Solution-1:

JavaScript Code:

// Define a function named exp that calculates the result of raising a base (b) to a power (n)
function exp(b, n) {
 // Initialize a variable ans to 1, which will store the result of the exponentiation
 var ans = 1;
 // Iterate from 1 to n (inclusive) to perform the exponentiation
 for (var i = 1; i <= n; i++) { // Multiply the current value of ans by the base (b) ans = b * ans; } // Return the final result of the exponentiation return ans; } // Log the result of calling exp with the base 2 and exponent 3 to the console console.log(exp(2, 3)); 

Output:

8

Flowchart:

Live Demo:

See the Pen JavaScript - Compute the value of bn where n is the exponent and b is the bases-function-ex- 15 by w3resource (@w3resource) on CodePen.

Sample Solution-2:

JavaScript Code:

// Define a function to calculate the exponentiation of a base raised to a power
function calculateExponent(base, exponent) {
 // Using the Math.pow() method to calculate the exponentiation
 const result = Math.pow(base, exponent);
 return result; // Return the result of the exponentiation
}
// Example usage with user input
// Prompt the user to enter the base value (b) and convert it to a floating-point number
const userBase = parseFloat(prompt("Enter the base (b):"));
// Prompt the user to enter the exponent value (n) and convert it to an integer
const userExponent = parseInt(prompt("Enter the exponent (n):"));
// Check if the user inputs are valid numeric values
if (!isNaN(userBase) && !isNaN(userExponent)) {
 // Call the calculateExponent function with user input and store the result
 const result = calculateExponent(userBase, userExponent);
 // Display the result of the exponentiation to the console
 console.log(`The result of ${userBase}^${userExponent} is: ${result}`);
} else {
 // Display an error message if the user inputs are not valid numeric values
 console.log("Invalid input. Please enter valid numeric values.");
}

Output:

The result of 2^3 is: 8

Flowchart:

For more Practice: Solve these Related Problems:

• Write a JavaScript function that computes the power of a base raised to an exponent using a recursive method.
• Write a JavaScript function that calculates b raised to the power n iteratively without using Math.pow.
• Write a JavaScript function that implements exponentiation by squaring to compute b^n in logarithmic time.
• Write a JavaScript function that computes the power of a number and properly handles edge cases such as negative exponents.

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