How to format numbers in JavaScript?

Question

How to format numbers in JavaScript?

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• JavaScript culture sensitive currency formatting

Answer 1

If you google for javascript printf, you'll find lots of implementations.

Answer 2

The best you have with JavaScript is toFixed() and toPrecision() functions on your numbers.

var num = 10;
var result = num.toFixed(2); // result will equal 10.00

num = 930.9805;
result = num.toFixed(3); // result will equal 930.981

num = 500.2349;
result = num.toPrecision(4); // result will equal 500.2

num = 5000.2349;
result = num.toPrecision(4); // result will equal 5000

num = 555.55;
result = num.toPrecision(2); // result will equal 5.6e+2

Currency, commas, and other formats will have to be either done by you or a third party library.