使用while循環輸入1 2 3 4 5 6 8 9 10
a = 1
while a < 11:
if a == 7:
pass
else:
print(a)
a = a + 1
求1-100所有數的和
a = 1
sum = 0
while a < 101:
sum = sum + a
a = a + 1
print(sum)
輸出1-100所有偶數
a = 1
while a < 101:
temp = a % 2
if temp == 0:
print(a)
else:
pass
求1-2+3-4+5...99的所有樹的總和
a = 1
sum = 0
while a < 100:
temp = a % 2
if temp == 0:
sum = sum - a
else:
sum = sum + a
a = a + 1
print(sum)
python 判斷三次登錄密碼錯誤
方法一:
passwd = "abcd1234"
huoqu = input("請輸入覈驗身份密碼:")
if huoqu == passwd:
print("密碼正確")
else:
print("密碼錯誤")
huoqu = input("請重新輸入:")
if huoqu == passwd:
print("密碼正確")
else:
print("密碼錯誤")
huoqu = input("請重新輸入:")
if huoqu == passwd:
print("密碼正確")
else:
print("三次機會錯誤請重試")
方法二:
passwd = "abcd1234"
huoqu = input("請輸入覈驗身份密碼:")
srcs = 1
while srcs < 3:
if huoqu == passwd:
print("密碼正確")
srcs = 3
else:
print("密碼錯誤")
huoqu = input("請重新輸入:")
srcs = srcs + 1
if srcs == 3:
print("三次錯誤請重試")