Number.parseFloat()
Parses a string argument and returns a floating point number.
Syntax
Number.parseFloat(string)Parameters
| Name | Type | Required | Description |
|---|---|---|---|
string | string | Yes | The value to parse. Leading whitespace is ignored. |
Returns
number — The parsed number, or NaN if the string cannot start a number.
Examples
console.log(Number.parseFloat('3.14abc'));
Output
3.14
console.log(Number.parseFloat(' .5px'), Number.parseFloat('x'));
Output
0.5 NaN
Notes
Parses as much of the leading numeric portion as possible and ignores trailing
garbage. Identical to the global `parseFloat`; the Number version exists for
modularity.
Browser & runtime support
| Environment | Since version |
|---|---|
| chrome | 34 |
| firefox | 25 |
| safari | 9 |
| edge | 12 |
| node | 0.12 |