JavaScript parseFloat() Function
Example
Parse different strings:
var a = parseFloat("10")
var b = parseFloat("10.00")
var c =
parseFloat("10.33")
var d = parseFloat("34 45 66")
var e = parseFloat("
60 ")
var f = parseFloat("40 years")
var g = parseFloat("He was 40")
Try it Yourself »
Definition and Usage
The parseFloat() function parses a string and returns a floating point number.
This function determines if the first character in the specified string is a number. If it is, it parses the string until it reaches the end of the number, and returns the number as a number, not as a string.
Note: Only the first number in the string is returned!
Note: Leading and trailing spaces are allowed.
Note: If the first character cannot be converted to a number, parseFloat() returns NaN.
Browser Support
| Function | |||||
|---|---|---|---|---|---|
| parseFloat() | Yes | Yes | Yes | Yes | Yes |
Syntax
parseFloat(string)
Parameter Values
| Parameter | Description |
|---|---|
| string | Required. The string to be parsed |
Technical Details
| Return Value: | A Number. If the first character cannot be converted to a number, NaN is returned |
|---|---|
| JavaScript Version: | ECMAScript 1 |
