41.00

$num = 42.0815;

function printFloatWithLeadingZeros($num, $precision = 2, $leadingZeros = 0){
    $decimalSeperator = ".";
    $adjustedLeadingZeros = $leadingZeros + mb_strlen($decimalSeperator) + $precision;
    $pattern = "%0{$adjustedLeadingZeros}{$decimalSeperator}{$precision}f";
    return sprintf($pattern,$num);
}

for($i = 0; $i <= 6; $i++){
    echo "$i max. leading zeros on $num = ".printFloatWithLeadingZeros($num,2,$i)."\n";
}

Source: stackoverflow.com

Similar codes

0 vote239 views1 answer
Unknown amount of threads cpp
C++
0 vote220 views1 answer
Get data from a content editable div
C++
0 vote254 views1 answer
How do I read computer current time in c++
C++
0 vote252 views1 answer
Return multiple objects from a function C++ using references
C++
1 vote239 views1 answer
Declare nullptr c++
C++
0 vote284 views1 answer
How to display score using SDL in c++
C++
1 vote240 views2 answers
How to get size of char array in c++
C++
2 votes249 views2 answers
Stack algorithm in c++
C++
0 vote251 views1 answer
Cpp cout more than 1 value
C++
-1 vote236 views1 answer
How to empty an array c++
C++