Gauss summation python problems

[LeadPipe]

Please help, my simple python script for calculating the gauss sum refuses to work. Here it is:

x=[1,100]

print(x[0]+x[1]*(x[1]/2))

any answers or fixes for a confused python user?

by the way should this have gone in another forum?

Also it was designed to be adaptable so someone can read it and know where to put their number to be calcualted