求1-100的和
n = 1 s = 0 while n < 101: s = s + n n = n + 1 print(s)
使用while循环输入123456 8910
n = 1 while n < 11: if n ==7: pass else: print(n) n = n + 1 print(‘---end---‘)
输出1-100内所有的偶数
n = 1 while n < 101: temp = n % 2 if temp == 0: print(n) else: pass n = n + 1 print(‘---end---‘)
#求1-2+3-4+5···+99
n = 1
s = 0
while n < 100:
temp = n % 2
if temp == 0:
s = s - n
else:
s = s + n
n = n + 1
print(s)
输出1-100内所有的奇数
n = 1
while n < 101:
temp = n % 2
if temp == 0:
pass
else:
print(n)
n = n + 1
print(‘---end---‘)
#用户登录（三次机会重试） count = 0 while count < 3: user = input(‘>>>‘) pwd = input(‘>>>‘) if user == ‘alex‘ and pwd == ‘123‘: print(‘欢迎登陆‘) break else: print(‘用户名或密码错误‘) count = count + 1
原文：https://www.cnblogs.com/lf6666/p/10120649.html