Im trying to find the summation from k=1 to 25, with the equation being k^2. This is my code, how do i get it do only display the final number only, not the ones in between?

I tried disp(Sum) at the end, but tells me that index exceeds matrix dimensions. Sum=0;

for k=1:25;

Sum = Sum + k.^2

end

Answer 1

[Guillaume]

If you use this exact code:

Sum=0;
for k=1:25;
   Sum = Sum + k.^2
end
disp(Sum)

and you get the error "Index exceeds matrix dimension", there can be only one reason: You have created a variable called disp and therefore matlab understands disp(Sum) as indexing into the disp variable instead of calling the disp function.

clear disp

would fix the problem. And this is a lesson to you not to name your variables the same as common matlab functions. You nearly did the same with your Sum variable which is extremely similar to the sum function. Other typical names that cause problems: max, min, diff.

Answer 2

[Bader Ben-Slimane]

Sum=0;

for k=1:25;

    Sum = Sum + k.^2;
end

disp(sum)

[Daniel]

It says Index exceeds matrix dimensions.

[Guillaume]

The both of you, please use the {} Code button to format code as code.

[Stephen23]

and please stop using Sum as a variable name!