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 vote245 views1 answer
Vermífugo significado
C++
-1 vote282 views1 answer
How to pass arrays by reference c++
C++
1 vote310 views1 answer
C++ data structures
C++
0 vote260 views1 answer
Get rest of a stringstream c++
C++
3 votes239 views2 answers
Pre increment vs post increment c++
C++
0 vote246 views1 answer
C++ thread incide class
C++
0 vote260 views1 answer
Namespace "std" n'a pas de membre "filesystem"
C++
0 vote240 views1 answer
How to take full sentence in c++
C++
2 votes252 views1 answer
Clrscr in cpp
C++
11 votes275 views2 answers
Str remove char c++
C++