public class MethodDemo {
  public static int sum(int i1, int i2) {
    int result = 0; 
    for (int i = i1; i <= i2; i++) 
      result += i; 
  	
    return result; 
  }
	
  public static void main(String[] args) { 
    System.out.println("Sum from 1 to 10 is " + sum(1, 10)); 
    System.out.println("Sum from 20 to 37 is " + sum(20, 37));
    System.out.println("Sum from 35 to 49 is " + sum(35, 49)); 
  }
}