Description

The parseFloat() function is used to parse a string and return a floating point number.

This function has the form:

parseFloat(string)

Parameter	Description
string	(optional) The string to be parsed

Note: If the first character cannot be converted to a number, parseFloat() returns NaN.

Examples

The following example shows the basic use of this method.

<script>
document.write(parseFloat("5"));
document.write("<br />");
document.write(parseFloat("123.45"));
document.write("<br />");
document.write(isNaN("67 89 1"));
</script>

This produces the following result:

Browser Support

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