Function randomNumber

randomNumber(minValue?: number, maxValue?: number): undefined | number
Returns a random number that between the value range
Parameters
- OptionalminValue: number
  the min value, inclusive
- OptionalmaxValue: number
  the max value, exclusive
Returns undefined | number
a random number that between the value range
Author
David Hsing
Example
```
randomNumber(1.1, 1.2);
randomNumber(-3.6, 2.8);
randomNumber(-3.6, -2.8);
```