sum of squares from m to n using python

Question

sample input:

3

4

sample output:

50

Answer 1

The "sample output" should be 25, of course.

def sos(m,n) :

if m > n :

return 0 # convention if m > n

else :

s = m**2 # m = n case

for i in range(m+1, n+1) : # loop if n > m

s += i**2

return s

m = 3; n = 4

print(sos(m,n), # cf. explicit formula

max(0, (n*(n+1)*(2*n+1)-(m-1)*m*(2*m-1))/6))