flutter How to generate random number between negitive and positive number specific range in dart file?

To generate random number in between positive and negitive range below is an example syntax from -50 to 50.

new Random().nextInt(50+50)-50;

Below is the example program to generate random number between 50 to -50.

import 'dart:math';
void main() {
print(new Random().nextInt(50 + 50) - 50);
}

Output:

-8