Python代码的第一天

#求一到一百所有整数的和
n = 1
s = 0
while n < 101:
    s = s + n
    n = n + 1
print(s）

#输出一到一百所有偶数
#pass
n = 1
s = 0
while n < 101:
    temp = n % 2
    if temp == 0:
        print(n)
    n = n + 1
else:
        pass

n = 1
s = 0
while n < 100:
    temp = n % 2
    if temp == 0:
        s = s - n   #前面的s指所有数的总和
    else:
        s = s + n
    n = n + 1
print(s)