Function toFloat

toFloat(
source?: null | string | number,
defaultValue?: number,
): undefined | number
Returns a float value from the given source
Parameters
- Optionalsource: null | string | number
  the source value to inspect
- OptionaldefaultValue: number
  the default value if the source cannot be converted
Returns undefined | number
a float value from the given source
Author
David Hsing
Example
```
toFloat('1.0');    // 1.0
```