結果輸出 1 2 3 4 5 6 8 9
count = 1
while count < 10:
    count = count + 1
    if count == 7:
        print('')
    else:
        print(count)

輸出0-100內的偶數
n = 1
while n < 101:
    temp = n % 2               求餘
    if temp == 0:              餘數為0輸出結果
        print(n)
    else:                      否則pass
 

        pass
    n = n + 1

求1-2+3-4+5-6----99
n = 1
s = 0
while n < 100:
     temp = n % 2         把餘數賦值給temp
     if temp == 0:        
         s = s - n
     else:
         s = s + n
     n = n + 1
print(s)

三次登陸驗證
count = 0
while count < 3:
    user 
 
= input('>>>')       使用者交換
    pwd = input('>>>')
    if user == 'alex' and pwd == '123':          條件語句
        print("歡迎登陸")
        print("......")
        break
    else:
        print("使用者名稱或者密碼錯誤")
    count = count + 1