"""输出除7以外的1-9数字"""
n = 0
while n < 10:
    if n == 7:
        pass
    else:
        print(n)
    n = n + 1
print("----end----")

"""1-100求和"""
1 n = 0
2 n2 = 0
3 while n < 100:
4     n = n + 1
5     n2 = n + n2
6 print(n2)

 

1 """输出1-100中的偶数"""
2 n = 1
3 while n < 101:
4     s = n % 2
5     if s == 0:
6         print(n)
7     else:
8         pass
9     n = n +1

 

"""求和1-2+3-4....99"""

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