How to count the trailing zeros in a binary number using JavaScript

1 Answer

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function countTrailingZeros(n) {
    let binaryStr = n.toString(2); // Convert to binary string
    let trimmedStr = binaryStr.replace(/0+$/, ''); // Remove trailing zeros
    
    return binaryStr.length - trimmedStr.length;
}


let number = 80; // binary: 1010000

console.log("Number of Trailing Zeros:", countTrailingZeros(number));




/*
run:

Number of Trailing Zeros: 4

*/

 



answered Jul 23, 2025 by avibootz
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