Computers are great at doing the same thing over and over. A loop is how we ask for that.

for i in range(3):
    print(i)   # 0, 1, 2

for name in ["Ada", "Linus"]:
    print(name)

lives = 3
while lives > 0:
    print("still playing")
    lives -= 1

• The indented lines are the body of the loop. They run every time.
• range(1, 11) counts from 1 up to 10. The last number is not included.
• break stops the loop immediately.

A while loop where the condition never becomes false runs forever. If that happens, press the ■ Stop button.

Press Run, then try to:

• Change range(5) to range(10). Then to range(2, 6).
• Add yourself to the crew.
• Remove the line countdown -= 1 and run it. What happens? Press Stop, then put the line back.

Print the 7 times table from 1 × 7 to 10 × 7, one line per row, exactly like 3 x 7 = 21.