？为什么不对

def my_sumA(a):
    if a+1<=100:
        sum=a+my_sumA(a+1)
    else:
        sum=0
    return sum
print(my_sumA(1))
def my_sumB(n):
    sum = 0
    if n == 1:
        sum = n
    else:
        sum = n + my_sumB(n - 1)
    return sum
print(my_sumB(100))