JavaScript parseFloat()
Examples
Parse different values:
parseFloat(10);
parseFloat("10");
parseFloat("10.33");
parseFloat("34 45 66");
parseFloat("He was 40");
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More examples below.
Definition and Usage
The parseFloat() method parses a value as a string and returns the first number.
Notes
If the first character cannot be converted, NaN is returned.
Leading and trailing spaces are ignored.
Only the first number found is returned.
Syntax
parseFloat(value)
Parameters
| Parameter | Description |
| value | Required. The value to parse. |
Return Value
| Type | Description |
| A number | NaN if no number is found. |
Browser Support
parseFloat() is an ECMAScript1 (ES1) feature.
ES1 (JavaScript 1997) is fully supported in all browsers:
| Chrome | IE | Edge | Firefox | Safari | Opera |
| Yes | Yes | Yes | Yes | Yes | Yes |
More Examples
Parse different values:
parseFloat("40.00");
parseFloat(" 40 ");
parseFloat("40 years");
parseFloat("40H")
parseFloat("H40");
Try it Yourself »
