python3入门----条件控制,循环

 条件

a=int(input())

if a == 1:
    print('a=1')
elif a == 2:
    print('a=2')
else:
    print('a=other')

 循环

for a in range(0,10,2):
    print(a,end=' | ')
else:
    print("----------end-------------")

b = [1,2,3,4]
for a in b:
    print(a,end=' | ')
print("----------end-------------")

a = 1
while a<5:
    print(a,end=' | ')
    a+=1
else:
    print("----------end-------------")

循环结果

0 | 2 | 4 | 6 | 8 | ----------end-------------
1 | 2 | 3 | 4 | ----------end-------------
1 | 2 | 3 | 4 | ----------end-------------