why does this code change the string but again revert back to original state

Question

function capital(b){
    let letter = b[0].toUpperCase();
    return letter + b.slice(1);
}

function correction(a){
    let place = a.indexOf('_');
    let part1 = a.slice(0, place);
    let part2 = a.slice(place+1);
    a = part1 + capital(part2);
    if (a.includes('_'))
        correction(a);
    return a;
}

When I call correction("Hey_there_How_are_you") , I see in while debugging that it becomes "HeyThereHowAreYou" but again becomes as original string itself. What could be the problem?

Answer 1

You need to return the result of the call in your conditional so that it can be used again.

 function capital(b) { let letter = b[0].toUpperCase(); return letter + b.slice(1); } function correction(a) { let place = a.indexOf('_'); let part1 = a.slice(0, place); let part2 = a.slice(place + 1); a = part1 + capital(part2); if (a.includes('_')) { return correction(a); } return a; } let x = correction("Hey_there_How_are_you"); console.log(x);