An "if-loop" and "for-loop" problem

Please help. I am trying to make a nested for-loop with a if-loop inside as follows:

 S=0;

 for i=1:10

     for j=(i+1):10

         for k=(j+1):10

             for l=(k):10

                 if i<j && j<k && k<l && range(l)~=0 && range(k)~=0 && range(j)~=0 && range(i)~=0

                     S=S+i*j*k*l;

                 end

             end

         end

     end

 end

This code doesn't work. Any way to solve this?

The purpose of the range function I used is that if the upper limit and the lower limit of the counter are the same, then S remains unchanged.

The result I want is something like S=1x2x3x4+1x2x3x5+1x2x3x6+.....+7x8x9x10

Answer 1

[the cyclist]

I haven't tried to run your code, but I'm going to guess here that the expressions like

range(i)

are not doing what you expect. i is just a scalar, so range(i) is always going to be equal to zero. The range command returns the difference between the maximum and the minimum value of the input.

I'm not quite sure what you intended there.

[Angus Wong]

Thanks.