Which type of loop would you use when you know the exact number of iterations in advance?

• A. For loop
• B. While loop
• C. Do-while loop
• D. Infinite loop

Answer: (A)

When you know exactly how many times something needs to run, a for loop is the natural choice. It’s built for fixed counts because you set up a counter that starts at an initial value, continues while a condition based on that counter is true, and then updates the counter each time through the loop. This makes the total number of executions explicit and predictable, so you can run the body exactly the required number of times—for example, performing an action ten times by starting a counter at 0, looping while the counter is less than 10, and incrementing the counter each iteration. The other loops aren’t as well suited: a while loop runs as long as a condition is true, which is ideal when you don’t know the exact count in advance; a do-while loop runs at least once and then checks the condition, which isn’t ideal when you must have a precise fixed count; an infinite loop has no termination condition at all.