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-------------