python，入门练习题

‘’‘使⽤while循环输出 1
2 3 4 5 6 8 9 10 ‘’’
def whileCycle():
i = 1
while i < 11:
print(“cycle index”,i)
i +=1
“”“求1-100的
所有数的和”""
def sum():
sum = 0
for i in range(1,101):
sum += i
print(“1-100sun =”,sum)
“”“输出 1-100
内的所有奇数”""
def findOdd():
for i in range(1,101):
if ( i % 2 != 0 ):
print(“odd number is”,i)
else:
continue

“”“输出 1-100 内的所有偶数”""
def findEven():
for i in range(1,101):
if ( i % 2 != 0 ):
continue
else:
print(“even number is”, i)

“”“求1-2+3-4+5 … 99的所有数的和”""
def counter():
sum = 0
str1 =""
for i in range(1,100):
if(i % 2 != 0):
sum += i
str1 += str(i)+’-’
else:
if i == 99:
str1 += str(i) + “=”
else:
sum -= i
str1 += str(i) + “+”
print(str1,"=",sum)

“”" ⽤户登陆（三次机会重试）"""
def userLogin():
inputCount = 0
while inputCount < 3:
userName = input(“输入用户名：”)
password = input(“请输入密码：”)
if(userName == “张三” and password == “123456”):
print(“欢迎你的到来。我是小杨”)
break
else:
inputCount += 1
print(“用户名或密码错误，你还有”,3-inputCount,“次登录机会”)

#调用函数
#findOdd()
#findEven()
#counter()
userLogin()