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Browse - programming tips - javascript zero pad

Date: 2007oct11
Language: javaScript

Q. javaScript has no sprintf() ... how can I zero pad a number?

A.  Use this function:

// n = number you want padded
// digits = length you want the final output
function zeroPad(n, digits) {
	n = n.toString();
	while (n.length < digits) {
		n = '0' + n;
	}
	return n;
}

function exampleUse() {
	var	a;

	// Pad 123 to 8 digits
	a = zeroPad(123, 8);
	alert('a='+ a);
}

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