Question

How to find the highest digit in int number with PHP

Answer 1

function getTheHighestDigit($n) {
    $max = 0;
    while ($n != 0) {
        if ($n % 10 > $max) $max = $n % 10;
        $n = (int)($n / 10);
    }
return $max;
}
 
$n = 213;
echo getTheHighestDigit($n) . "\n";
         
$n = 76594;
echo getTheHighestDigit($n) . "\n";
         
$n = 76852;
echo getTheHighestDigit($n);
  
     
     
 
/*
run:
 
3
9
8
 

 

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