Day1_Python基础_14.表达式for loop

最简单的循环10次

#_*_coding:utf-8_*_
__author__ = 'Alex Li'
 
 
for i in range(10):
    print("loop:", i )

输出

loop: 0
loop: 1
loop: 2
loop: 3
loop: 4
loop: 5
loop: 6
loop: 7
loop: 8
loop: 9

需求一：还是上面的程序，但是遇到大于5的循环次数就不走了，直接跳出本次循环进入下一次循环

for i in range(10):
    if i>5:
        continue #不往下走了,跳出本次循环直接进入下一次循环
    print("Result:", i )

Result: 0
Result: 1
Result: 2
Result: 3
Result: 4
Result: 5

 

需求二：还是上面的程序，但是遇到小于5的循环次数就不走了，直接跳出本次循环进入下一次循环

for i in range(0,10):
    if i < 5:
        continue
    print("Result:",i)

Result: 5
Result: 6
Result: 7
Result: 8
Result: 9

 

需求三：还是上面的程序，但是遇到等于5的循环次数就不走了，直接跳出本次循环进入下一次循环

for i in range(0,10):
    if i == 5:
        continue
    print("Result:",i)

Result: 0
Result: 1
Result: 2
Result: 3  
Result: 4  
Result: 6  #没有5，直接从4到6了
Result: 7
Result: 8
Result: 9

---

 

# --------------break测试，结束当前循环---------------
for i in range(5):
    print(i,"======")
    for city in range(5):
        print(city)
        if city > 3:
            break

0 ======
0
1
2
3
4
1 ======
0
1
2
3
4
2 ======
0
1
2
3
4
3 ======
0
1
2
3
4
4 ======
0
1
2
3
4

 

 

# Author: George.Wang

# for i in range(10):
#     print("Result:",i)

# for i in range(0,10,2):   # 这里的0是开始数，10是结束数，2是步长数
#     print("Result:",i)

'''
my_age=10
for i in range(3):
    guess_age = int(input("Please input my age:"))
    if guess_age == my_age:
        print("Congratulations! you got my age.")
        break
    elif guess_age > my_age:
        print("I'm sorry, your answer is bigger than my age.let's try again.")
    else:
        print("I'm sorry, your answer is smaller than my age.let's try again.")
else:
    print("you have tried three times, plase restart again.")
'''