for walks a sequence. while repeats until a condition is false. range makes integer sequences.

Goal

Loop with for, range, enumerate, zip, and break/continue.

for

for city in ["Nairobi", "Mombasa", "Kisumu"]:
    print(city)

range

print(list(range(5)))
print(list(range(2, 8)))
print(list(range(0, 10, 2)))
for n in range(1, 4):
    print(n, n ** 2)

range is not a list until you ask (list(range(...))). It is fine to loop it directly.

enumerate and zip

names = ["Ada", "Alan", "Grace"]
scores = [98, 91, 95]
for i, name in enumerate(names, start=1):
    print(i, name)
print()
for name, score in zip(names, scores):
    print(f"{name}: {score}")

while

n = 3
while n > 0:
    print(n)
    n -= 1
print("done")

break and continue

for n in range(8):
    if n == 0:
        continue
    if n == 5:
        break
    print(n)

continue skips the rest of this round. break leaves the loop.

Accumulate

total = 0
for score in [98, 91, 95, 88]:
    total += score
print(total, total / 4)

Pitfall

while True: without break never finishes. If a cell hangs, stop and edit the condition.