Checking if a number is a valid power of 4 in JavaScript

Problem

We are required to write a JavaScript function that takes in a single integer, num, as the only argument. Our function should check whether this number is a valid power of 4 or not. If it is a power of 4, we should return true, false otherwise.

For example, if the input to the function is −

const num1 = 2356; const num2 = 16;

Then the output should be −

const output1 = false; const output2 = true;

Example

The code for this will be −

const num1 = 2356; const num2 = 16; const isPowerOfFour = (num = 1) => {    let bool = false;    for(let i = 0; i < 16; i++){       if( Math.pow(4,i) === num){          bool=true;          return bool;       };    };    return bool; }; console.log(isPowerOfFour(num1)); console.log(isPowerOfFour(num2));

Output

And the output in the console will be −

false true