This code worked but how??

Question

Hey there, I'm currently doing a Crash Course on Python in Coursera offered by Google. There was a question, I didn't know how to solve it so I just tried solving it and accidentally, solved it. I know it sounds stupid but that's what happened with me. So would you please explain me how this code worked??

Fill in the blanks of sum_square function such that it returns the sum of all the square of numbers between 1 & x (not included)

def square(n):
return n*n
def sum_squares(x):
sum = 0
for n in range(x):
sum += square(n)
return sum

print(sum_squares(10))

OUTPUT:
285

https://code.sololearn.com/c46mGzz2qgi4/?ref=app

Answer 1

You have called sum_square(10). Inside this function, for range(10)( for 0,1,2,... ,9)It calls square(n) function. square (n) returns n*n, hence, sum=sum+square of the particular number. This happens for the range(10). So you got the answer! :-)

Answer 2

I am having a hard time why its doing a sum = sum +Square(n). Confused on the addition . Can any one explain ?

when sum = 1 and we are on range 2
sum = 1+2^2
sum = 5 -> But that is not really square(2)