Number.parseFloat()
The Number.parseFloat()
method parses an argument and returns a floating point number. If a number cannot be parsed from the argument, it returns NaN
.
Syntax
Number.parseFloat(string)
Parameters
string
-
The value to parse. If this argument is not a string, then it is converted to one using the
ToString
abstract operation. Leading whitespace in this argument is ignored.
Return value
A floating point number parsed from the given string
.
Or NaN
when the first non-whitespace character cannot be converted to a number.
Polyfill
if (Number.parseFloat === undefined) { Number.parseFloat = parseFloat; }
Examples
Number.parseFloat vs parseFloat
This method has the same functionality as the global parseFloat()
function:
Number.parseFloat === parseFloat; // true
This method is also part of ECMAScript 2015. (Its purpose is modularization of globals.)
See parseFloat()
for more detail and examples.
Specifications
Browser compatibility
Desktop | Mobile | |||||||||||
---|---|---|---|---|---|---|---|---|---|---|---|---|
Chrome | Edge | Firefox | Internet Explorer | Opera | Safari | WebView Android | Chrome Android | Firefox for Android | Opera Android | Safari on IOS | Samsung Internet | |
parseFloat |
34 |
12 |
25 |
No |
21 |
9 |
≤37 |
34 |
25 |
21 |
9 |
2.0 |
See also
- A polyfill of
Number.parseFloat
is available incore-js
-
Number
-
The object this method belongs to.
- The global
parseFloat()
method.
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https://developer.mozilla.org/en-US/docs/Web/JavaScript/Reference/Global_Objects/Number/parseFloat