Python练习代码

count = 1
sum = 0
while count <= 100:
    sum = sum + count
    count += 1
print(sum)

count = 1
num = 0
while count <= 100:
    count += 1
    num += 1
    if num%2 == 0: continue
    else: 
        print(num)

count = 1
num = 0
while count <= 100:
    count += 1
    num += 1
    if num%2 == 0:
        print(num)

count = 1
num = 1
sum = 0
while count <= 99:
    if num%2 == 0:
        num = -num        #判断奇数偶数，奇数为正，偶数为负
    else:
        num = num
    sum = sum + num
    count += 1
    num += 1
print(sum)

count = 1
num = 0
while count < 10:
    count += 1
    num += 1
    if num == 7:continue
    else:print(input(‘请输入数字‘+str(num)))

count = 1
while count <= 3:
    ID = input(‘请输入账号:‘)
    Password = input(‘请输入密码:‘)
    count += 1
    if ID == ‘关元最帅‘ and Password == ‘无敌帅‘:
        print(‘登陆成功‘)
        break
    elif count <= 3:
        print(‘登陆失败,还有‘ + str(4-count) + ‘次机会‘)
    else:
        print(‘登陆失败超过三次‘)