Python Loop

Anh-Thi Dinh
Python

for

1for i in range(3):
2    print(i)
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1for i in range(3):
2    print(i)
3else:
4    print('no left')
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4no left

Skip some step

1# don't contain 5 (way 1)
2for i in [x for x in range(10) if x != 5]:
3    print i
1# don't contain 5 (way 2)
2for i in list(range(5)) + list(range(6, 10)):
3    print i
1# next (skip 5)
2xr = iter(range(10))
3for i in xr:
4    print(i)
5    if i == 4: next(xr)
1# continue (skip 5)
2for i in range(10):
3    if i == 5: continue
4    print(i)

while

1i = 1
2while i < 4:
3    print(i)
4    i += 1
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You can also use next and continue like in the case of for but with caution!

break

1for i in range(6):
2    print(i)
3    if i==2: break
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1i = 1
2while i < 6:
3    print(i)
4    if i==3: break
5    i += 1
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33