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
.
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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
Specification |
---|
ECMAScript (ECMA-262) The definition of 'Number.parseFloat' in that specification. |
Browser compatibility
The compatibility table in this page is generated from structured data. If you'd like to contribute to the data, please check out https://github.com/mdn/browser-compat-data and send us a pull request.
Desktop | Mobile | Server | |||||||||||
---|---|---|---|---|---|---|---|---|---|---|---|---|---|
parseFloat | Chrome Full support 34 | Edge Full support 12 | Firefox Full support 25 | IE No support No | Opera Full support 21 | Safari Full support 9 | WebView Android Full support ≤37 | Chrome Android Full support 34 | Firefox Android Full support 25 | Opera Android Full support 21 | Safari iOS Full support 9 | Samsung Internet Android Full support 2.0 | nodejs Full support 0.12 |
Legend
- Full support
- Full support
- No support
- No support
See also
-
Number
- The object this method belongs to.
- The global
parseFloat()
method.