Asked by Aaron Moris
on 11 Apr 2011

What is the product if the question is write a program that calculates and prints the sum of the even integers from 2 to 30?

Answer by Florin Neacsu
on 11 Apr 2011

2+4+6+...+30=2(1+2+3+...+15)=2*(15*16)/2=15*16

So 2+4+...+n = floor(n/2)*(floor(n/2)+1).

Regards, Florin

Answer by Matt Fig
on 11 Apr 2011

The product would be the sum of the even integers from 2 to 30 ;-).

Seriously, what have you tried so far on this homework problem?

Paulo Silva
on 11 Apr 2011

I hate when it takes more time to understand what people want than to make their answer!

Answer by Doug Eastman
on 11 Apr 2011

or

sum(2:2:30)

Paulo Silva
on 11 Apr 2011

Paulo Silva
on 11 Apr 2011

btw that does work and is a good answer for the question (only if the values don't change), +1 vote

Answer by Matt Tearle
on 11 Apr 2011

disp(240)

Or, for pedants who claim that evaluation is not the same as calculation,

disp(239+1)

Sean de Wolski
on 11 Apr 2011

This is definitely the most compact and efficient way to do this. +1.

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