if…if…if…搭配成的语句块,会一个个去匹配是否满足if里面的语句;
if与elif的搭配成的语句块,当匹配到if或者elif语句判断为True的时候,那么不会执行下面elif以及else里面的语句;
示例1:
a = 10
if a > 1:
print(1)
else:
print(0)
运行结果:
1
示例2:
a = 10
if a > 1:
print(1)
if a > 2:
print(2)
if a < 3:
print(3)
else:
print(0)
运行结果:
1
2
0
示例3:
a = 10
if a > 1:
print(1)
elif a > 2:
print(2)
elif a < 3:
print(3)
else:
print(0)
运行结果:
1
示例4:
a = 10
if a > 1:
print(1)
elif a > 2:
print(2)
elif a < 3:
print(3)
if a > 4:
print(4)
elif a > 5:
print(5)
else:
print(0)
运行结果:
1
4