while
while True条件使得除非遇到break语句,否则不可能退出循环
如果陷入无限循环,使用计算机上的ctrl + c来强制终止
count=0
while count<=5:
print(count)
count=count+1
结果:
break
count=0
while count<=5:
if count==3:
break
print(count)
count=count+1
结果:
当知道要循环多少次时,Range很有用
count=list(range(1,5))
print(count)
while len(count)>0:
first=count[0]
count.remove(first)
print(count)
结果: