1、使用while迴圈輸入1234568910

 n = 1
 while n < 11:
     if n == 7:
         pass
     else:
         print(n)
     n = n + 1

2、求1 - 100的所有數的和

n = 1
s = 0
while n < 101:
    s = s + n
    n = n + 1

print(s)

3、輸出1 - 100內的所有奇數

n = 1
while n < 101:
    temp = n % 2
    if temp == 0:
        
 
pass
    else:
        print(n)
    n = n + 1

print('----end----')

4、輸出1 - 100內的所有偶數

n = 1
while n < 101:
    temp = n % 2
    if temp == 0:
        print(n)
    else:
        pass
    n = n + 1

print('----end----')

  5、求1 - 2 + 3 - 4 + 5...99的所有數的和

n = 1
s = 0  # s是之前所有數的總和
while
 
 n < 100:
    temp = n % 2
    if temp == 0:
        s = s - n
    else:
        s = s + n
    n = n + 1

print(s)

6、設計登入小程式，有三次機會

import datetime
username = "keys"
password = "123456"
no = 2
while no >= 0:
    input_name = input("請輸入你的賬號：")
    input_pswd = input("請輸入你的密碼：")
    if username == input_name and
 
 password == input_pswd:
        print("恭喜您"+username+"登入成功,今天是{}".format(datetime.datetime.today()))
        break
    elif input_name == "" or input_pswd == "":
        print("使用者名稱或密碼不能為空，請重新輸入")
        print("您還有"+str(no)+"次機會！！！")
    else:
        if username != input_pswd or password != input_pswd:
            print("\n賬號或密碼錯誤,請重新輸入")
            print("溫馨提示，您還有"+str(no)+"次機會")
        else:
            print("您的次數已用完。")
    no = no -1