014 - add leading zeroes

function addLeadingZeroes(numeric, padding = 1) {
    const pad = new Array(padding).fill(0).join("");

    return (pad + numeric).slice(-1 - padding);
}

console.info(addLeadingZeroes(4));
// Output "04"

console.info(addLeadingZeroes(25));
// Output "25"

console.info(addLeadingZeroes(25, 2));
// Output "025"