Function randi_range 

pub fn randi_range(from: i64, to: i64) -> i64

Returns a random signed 32-bit integer between from and to (inclusive). If to is lesser than from, they are swapped.

randi_range(0, 1)      # Returns either 0 or 1
randi_range(-10, 1000) # Returns random integer between -10 and 1000