错在哪里，老师

Question

错在哪里def square_of_sum(L):    X=0    Y=0    while  x<=len(L)-1:        Y=Y+L[x]*L[x]        x=x+1    return Yprint square_of_sum([1,2,3,4,5])print square_of_sum([-5,0,5,15,25])