1.用户登录判断
name = input("请输入姓名")
pwd = input("请输入密码")
if name == "alex" and pwd == "123":
print('yes')
else:
print('no')
进阶：只能输入三次错误
i = 0
while i < 3:
name = input("请输入用户名：")
pwd = input("请输入密码")
if name == "admin" and pwd == "pwd":
print("登陆成功")
break
else:
print("请再次输入")
i += 1
print("登录失败")
2.输出1到10
import time
kaishi = 1
while True:
print(kaishi)
if kaishi == 10:
break
kaishi = kaishi + 1
time.sleep(1)
print('end')
进阶：输出除7外的1到10
start = 1
while True:
if start == 7:
start += 1
continue
print(start)
if start == 10:
break
start += 1
3.计算1到100
start = 1
sum = 0
while True:
print(start)
sum = sum + start
if start == 100:
break
start += 1
print(sum)
进阶：输出1-2+3....
sum = 0
start = 1
while start < 100:
temp = start % 2
if temp == 1:
if start == 1:
s = str(start)
else:
s = s + "+" +str(start)
sum = sum + start
else:
s = s + "-" +str(start)
sum = sum - start
start += 1
print(s)
print(sum)
4.奇数偶数
偶数.
i = 1
while True:
if i == 101:
break
s = i % 2
if s == 0:
print(i)
i += 1
奇数.
start = 1
while True:
if start == 101:
break
temp = start % 2
if temp == 0:
pass
else:
print(start)
start += 1