练习题：while循环

## 使用while循环输入 1、2、3、4、5、6、8、9、10

方法一：

n = 1
while n < 11:
    if n == 7:
        pass
    else:
        print(n)
    n += 1

方法二：

a = 0
n = 1 
while a < 10:
    if n == 7:
        pass
    else:
        print(n)
    n += 1
    a += 1

##输出1-100内的所有数

n = 1
while n < 101:
    print(n)
    n += 1

##输出1-100内的所有奇数

n = 1
while n < 101:
    temp = n % 2 
    if temp == 0:
        pass
    else:
        print(n)
    n += 1

##输出1-100内的所有偶数

n = 1
while n < 101:
    temp = n % 2 
    if temp == 0:
        print(n)
    else:
        pass
    n += 1

##求1-100的所有数的和

n = 1
sum = 0
while n <101:
##    print(n)
    sum = sum + n
    n += 1
print(sum)

##求1-2+3-4+5.。。。99的所有数的和

n = 1
sum = 0
while n < 100:
    temp = n % 2
    if temp == 0:
        sum = sum - n
    else:
        sum = sum + n
    n += 1
print(sum)