python编程中whihe语句用于循环执行程序,即在某条件下,循环执行某段程序,以处理需要重复处理的相同任务。
while循环语句格式:
while <判断条件>:
执行语句
count = 0
while (count <9):
print("The count is:",count)
count = count + 1
else:
print("Good bye!")
无限循环:
如果条件判断语句永远为Ture,循环将会无限的执行下去:
m = 1
while m == 1:
num = int(input("Enter a number:"))
print("you enterd: ",num)
print("Good bey!")
循环使用else语句:
在python中,for else,else中的语句会在循环正常执行完的情况下执行,while...else也是这样的。
count = 0
while count < 5:
print(count,"is less than 5")
count = count +1
else:
print(count,"is not less than 5")
以上输出结果为:
0 is less than 5
1 is less than 5
2 is less than 5
3 is less than 5
4 is less than 5
5 is not less than 5
简语句组:
类似if语句,如果你的while循环体只有一条语句,那么可以将该语句与while写在同一行:
m = 1
while (m):print("Give flag is really true")
print("Good bey")