An array called nums has already been created for you with the values {10, 20, 30, 40, 50}.

Your task is to print all elements separated by a comma and a space, but with NO comma after the last element.

This is a common pattern in programming. The trick is to check whether you are at the last element before printing the comma. Inside the loop, print the element first, then check: if the current index i is less than 4 (meaning it's not the last element), print ", " after it.

Expected output:
10, 20, 30, 40, 50