1、使用while循环输入 1 2 3 4 5 6 8 9 10
1 while True: 2 for i in range(1,11): 3 if i == 7: 4 continue 5 6 print i 7 break
2、求1-100的所有数的和
a=0 for i in range(1,101): a +=i print a
3、输出 1-100 内的所有奇数
for i in range(1,101): if i%2 != 0: print i
4、输出 1-100 内的所有偶数
1 for i in range(1,101): 2 if i%2 == 0: 3 print i
5、求1-2+3-4+5 ... 99的所有数的和
1 sun1 = 0 2 sun2 = 0 3 for i in range(1,101): 4 if i%2 != 0: 5 sun1 += i 6 else: 7 sun2 +=i 8 sum = sun1-sun2 9 print sum
6、用户登陆(三次机会重试)
1 n = 1 2 name ='guigu' 3 pwd = 'guigu' 4 while True: 5 username = raw_input('请输入用户名: ') 6 password = raw_input('请输入密码: ') 7 if username == name and password == pwd: 8 print 'hello,%s' % username 9 break 10 else: 11 n = n + 1 12 if n > 3: 13 break