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# YUI Library Examples: DataType Utility: DataType.Number.parse()

## DataType Utility: DataType.Number.parse()

The Number module of the DataType Utility allows you to take a data value and convert it to a number.

View example in new window.

Value to parse:

To convert a data value to a number, simply call the `parse()` function of the DataType.Number class:

    YUI().use("datatype-number", function(Y) {    var output = Y.DataType.Number.parse("123123.123");    // output is the number 123123.123});

    YUI().use("datatype-number", function(Y) {
        var output = Y.DataType.Number.parse("123123.123");
        // output is the number 123123.123
    });

YUI().use("datatype-number", function(Y) { var output = Y.DataType.Number.parse("123123.123"); // output is the number 123123.123 });

Under the hood, the data value is converted to a number via `+data`, not `parseInt()`. When the resulting value is `NaN`, then null is returned:

    YUI().use("datatype-number", function(Y) {    var output = Y.DataType.Number.parse("$100");    // output is null     output = Y.DataType.Number.parse("20 dollars");    // output is null     output = Y.DataType.Number.parse(new Date("Jan 1, 2000"));    // output is 946713600000 });

    YUI().use("datatype-number", function(Y) {
        var output = Y.DataType.Number.parse("$100");
        // output is null

        output = Y.DataType.Number.parse("20 dollars");
        // output is null

        output = Y.DataType.Number.parse(new Date("Jan 1, 2000"));
        // output is 946713600000

    });

YUI().use("datatype-number", function(Y) { var output = Y.DataType.Number.parse("$100"); // output is null output = Y.DataType.Number.parse("20 dollars"); // output is null output = Y.DataType.Number.parse(new Date("Jan 1, 2000")); // output is 946713600000 });

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