python条件控制,循环
if else
mood = True
if mood:
print('python')
elif mood:
print('aaa')
else:
print("java")
print('over')
while
while condition:
pass
else:
pass
# 当conditon为False时,执行else后的语句
for
for x in range(0,10):
print(x)
# 连续打印0到10十个数字
for x in range(0,10,2):
print(x)
# 连续打印0,2,4,6,8,range()最后一个数字表示步长
###########################
a = [1,2,3,4]
for x in a:
print(x)
else:
print("over")
# 当for循环正常遍历完之后执行else后的语句
# 若是for循环因break终止,则不会执行else后的语句,若是continue跳过,则还会执行else
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