Write a for loop that prints all even numbers between 10

Question

Problem

1. How many numbers does this loop print?

for (int n = 10; n>= 0' n--)
{
System.out.println(n);
}

2. Write a for loop that prints all even numbers between 10 and 20 (inclusive).

3. Write a for loop that computes the sum of the integers from 1 to n.