:sig
f64 float_val(String s)

:params
s : string to be converted
return value : a f64 containing the number (0 if no number could be identified).

:see
>string
int_val
String

:content
Extracts a floating point number from a `String`.

If no usable number can be identified, the result is `0`.

## Related Concepts

- PHP: `floatval()`
- JavaScript / Node.js: `Number()` or `parseFloat()`