Learn C Programming

Lesson 2 of 9 · Loops and Jump Statements

Module 6 · Loops and Jump Statements

for: Init, Condition, Update, Traced

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Bob had one job before the school raffle: print the ticket numbers 1 to 10. He typed a loop in a hurry and sent the list to the printer. It stopped at 9. The owner of ticket 10 found out at the prize table.

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What is inside for: Init, Condition, Update, Traced

  1. The for header: init, condition, update
  2. The order the parts run in, traced
  3. A for is a while with its parts gathered
  4. Counting down, counting in steps, and for (;;)
  5. The loop variable lives only inside the loop
  6. Off by one: which comparison to write
  7. Leave the loop variable alone in the body
  8. Two counters and the comma
  9. Checking a loop against a formula