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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