Write a program that prints out the sum of the numbers from 1 to n, where n can be any positive integer. Use a method to calculate this sum, with one parameter of one int n. You can also read in the int from the user to make the program more interactive.
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import java.util.Scanner; class Main { public static void main(String[] args) { Scanner x = new Scanner(System.in); int n = x.nextInt(); int sum = 0; if (n >= 1){ sum = my_sum(n); System.out.println(sum); } } public static int my_sum(int n) { int sum = 0; for ( int a=1; a <=n; a++ ) { sum = sum + a; } return sum; } }
I actually don't know how to do this one.