编程语言比较

输出结果

2.12

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程式码

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JavaScript

const val = 2.123456789
console.log(val.toFixed(2))

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PHP

<?php
$val = 2.123456789;
print sprintf("%.2f", $val)."\n";

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Perl

my $val = 2.123456789;
print sprintf("%.2f", $val)."\n";

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Python

val = 2.123456789
print('{:.2f}'.format(val))

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Ruby

val = 2.123456789
puts sprintf("%.2f", val)

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Shell

VAL=2.123456789;
RESULT=`printf "%.2f" $VAL`;
echo $RESULT;