// Compute the sum of the first five natural numbers
public class ComputeSumWithIdioms
{
    public static void main(String args[])
    {
        int sum = 0;
        int i = 1;
        
        sum += i;               // sum now equals 1
        i++;                    // i now equals 2
        sum += i;               // sum now equals 3
        i++;                    // i now equals 3
        sum += i;               // sum now equals 6     
        i++;                    // i now equals 4
        sum += i;               // sum now equals 10
        i++;                    // i now equals 5
        sum += i;               // sum now equals 15
        System.out.println(sum);
    }
}