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

-1 vote235 views1 answer
C++ set console title
C++
0 vote247 views1 answer
Cpp fread
C++
0 vote240 views1 answer
Compile c++ MPI Program
C++
35 votes231 views2 answers
How to remove middle element in vector c++
C++
0 vote218 views1 answer
Calculating Function codeforces in c++
C++
0 vote221 views1 answer
Zero fill in c++
C++
0 vote241 views1 answer
Use set to get duplicates in c++
C++
8 votes257 views4 answers
C++ max and min of vector
C++
0 vote233 views1 answer
Ue_log example
C++
4 votes209 views3 answers
C++ vector combine two vectors
C++