JS RightPad
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function doStuff(s) {
if (s.indexOf('.') == -1) s += '.';
while (s.length <= s.indexOf('.') + 2) s += '0';
return s;
}
console.log(doStuff("3"));
console.log(doStuff("3.0"));
console.log(doStuff("3.1"));
console.log(doStuff("3.00"));
console.log(doStuff("3.10"));
console.log(doStuff("3.01"));
console.log(doStuff("3.22"));
console.log(doStuff("3.224"));
console.log(doStuff("3.000"));
JavaScript
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