Python学习笔记008

while循环

while 条件 ：

执行

num =1

while num<=10:
    print(num)
    num+=1

1-100偶数

方法1

num =2

while num<=10:
    print(num)
    num+=2

方法2

num =1

while num<=100:
    if num%2 == 0:
        print(num)
    num+=1

猜年龄

age=50

while True:
    user_input_age=int(input("Age is :"))
    if user_input_age == age:
        print("Yes.")
    elif user_input_age < age:
        print("A little smaller!")
    else:
        print("A little bigger!")
print("End")

猜对停止

方法1

age=50
flag = True

while flag:
    user_input_age=int(input("Age is :"))
    if user_input_age == age:
        print("Yes.")
        flag = False
    elif user_input_age < age:
        print("A little smaller!")       
    else:
        print("A little bigger!")
print("End")

方法2

age=50

while True:
    user_input_age=int(input("Age is :"))
    if user_input_age == age:
        print("Yes.")
        break
    elif user_input_age < age:
        print("A little smaller!")       
    else:
        print("A little bigger!")
print("End")

break

num =1

while num<=10:
    print(num)
    num+=1
    if num ==3:
        break

continue 之后代码不执行，结束当次循环，进行下一次循环

num =1

while num<=10:    
    num+=1
    if num ==3:
        continue
    print(num)

while  条件：

　　执行

else: 当循环正常结束后

　　执行

num =1

while num<=10:    
    num+=1
    if num ==3:
        continue
    print(num)
else:
    print("This is else statement.")