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Python-for and while loop -break, continue, pass, else instructions
- Loop (for and while)
- for loop
- while loop
- and while loops for comparison
- Cycle will be used four statements
- break - if ... break cycle internal use only (if certain conditions are met, out of this cycle, the contents of the outer execution cycle)
- continue (in line with the conditions of the end of this cycle, for the next cycle)
- pass (skip to occupy a position that "doing nothing")
- else (with the statement after the loop, the loop ends can be executed else statement)
Loop (for and while)
for loop
for i in [1,2,3,4,5]:
print(i*5)
#答案如下：
5
10
15
20
25
#搭配range函数使用
for i in range(5):
print(i)
#答案如下
0
1
2
3
4
while loop
a = 0
while a < 5:
a = a + 1
print(a)
#结果展示
1
2
3
4
5
#案例说明
password = '' # 变量password用来保存输入的密码
while password != '123':
password = input("请尝试输入密码")
print("欢迎回家")
#结果展示
请尝试输入密码256
请尝试输入密码123
欢迎回家
and while loops for comparison
1、例如要把字符串'猫看见'拆成一个个字符打印出来，这件事【工作量确定】，适合用for循环
2、比如输入密码，我们不知道它要几次才能输入正确，适合使用while循环
Cycle will be used four statements
break - if ... break cycle internal use only (if certain conditions are met, out of this cycle, the contents of the outer execution cycle)
continue (in line with the conditions of the end of this cycle, for the next cycle)
pass (skip to occupy a position that "doing nothing")
else (with the statement after the loop, the loop ends can be executed else statement)
