AnandIsCoding

module.exports = { isPowerOfTwo };

function isPowerOfTwo(n) {
    if (n <= 0) return false;  // Handle non-positive numbers
    return (n & (n - 1)) === 0; // Check if it's a power of two
}

// Test Cases
console.log(isPowerOfTwo(1)) // true  (2^0)
console.log(isPowerOfTwo(3)) // false (not a power of 2)

AnandIsCoding

function calculateBMI(weight, height) {
    // Write your code here
   if(isNaN(weight) || isNaN(height)  || weight<=0 || height <=0 || typeof weight === "undefined" || typeof height === "undefined"){
        return 'Invalid input'
    }
    // Even if the inputs are strings (e.g., "70kg", "1.75m"), parseFloat will convert valid numeric portions into numbers.
    weight = parseFloat(weight)
    height = parseFloat(height)
    const bmi = weight / (height * height);
    if (bmi < 18.5) {