Question

I have a function GetLetters that returns

1. a when I give it 1

2. b when I give it 2

3. z when I give it 26

4. aa when I give it 27

5. ab when I give it 28

Basically you’d get the idea, this is my solution however it is looping indefinitely when I supply any input value above 26, does anyone know what’s wrong with it ?

function GetLetter($amt){
    if($amt<=26){
        return strtolower(chr(64+$amt));
    }
    $letters=array();
    while(true){
        $quotient=$amt%26;
        array_unshift($letters,GetLetter($quotient===0?26:$quotient));
        $amt=floor(($amt-1)/26);
        if($amt===0){
            break;
        }
    }
    return implode("",$letters);
}

Answer 1

See here, you’re comparing floats. Try intval().

So change

if($amt===0){

to

if(intval($amt)==0){