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JavaScript > Code Examples

A Generic Number-Formatting Routine

A Generic Number-Formatting Routine <HTML> <HEAD> <TITLE>Number Formatting - Happy Codings :-) JavaScript Code Examples</TITLE> <SCRIPT LANGUAGE="JavaScript"> // generic positive number decimal formatting function function format (expr, decplaces) { var str = "" + Math.round (eval(expr) * Math.pow(10,decplaces)) while (str.length <= decplaces) { str = "0" + str } var decpoint = str.length - decplaces return str.substring(0,decpoint) + "." + str.substring(decpoint,str.length); } function dollarize (expr) { return "$" + format(expr,2) } </SCRIPT> </HEAD> <BODY> <H1>Make Money - Happy Codings :-) JavaScript Code Examples</H1> <FORM> Enter a positive floating-point value or arithmetic expression to be converted to a currency format:<P> <INPUT TYPE="text" NAME="entry" VALUE="1/3"> <INPUT TYPE="button" VALUE="Dollars and Cents" onClick="this.form.result.value=dollarize(this.form.entry.value)"> <INPUT TYPE="text" NAME="result"> </FORM> </BODY> </HTML>