Generate random number in scala

Scala program for Generate random number . Here more information.

/*
   Scala program for
   Print random number
*/
class Program {
	// Print random number in given size
	def simple_random(size: Int): Unit = {
		var number: Int = 0;
		var i: Int = 0;
		val r = new scala.util.Random
		while (i < size) {
			// Get new rand number
			number = r.nextInt();
			print(s"$number\n");
			i += 1;
		}
	}
	def random_between_range(first: Int, last: Int): Unit = {
		val r = new scala.util.Random
		// Calculate random number
		var number: Int = first + r.nextInt((last-first)-1) ;
        print(s"$number\n");
	}
}
object Main {
	def main(args: Array[String]): Unit = {
		var obj: Program = new Program();
		// Test Case
		obj.simple_random(3);
		// Range from 1 to 10
		obj.random_between_range(1, 10);
		// Range from 50 to 100
		obj.random_between_range(50, 100);
		// Range from 1000 to 2000
		obj.random_between_range(1000, 2000);
	}
}

Output

-1179642050
994544136
-2082770069
1
77
1355