While loops

while repeats a block while the condition is true.

i = 1
while i <= 5:
    print(i)
    i += 1

Without i += 1, the condition never becomes false and the loop runs forever (infinite loop).

break

Exit the loop immediately:

i = 1
while True:
    if i > 3:
        break
    print(i)
    i += 1

continue

Skip to the next iteration:

i = 0
while i < 5:
    i += 1
    if i == 3:
        continue   # skip 3
    print(i)

else on while

Runs when the loop ends normally (no break):

i = 1
while i <= 3:
    print(i)
    i += 1
else:
    print("done")