way to use returned valued of a if clause

I have an if clause

if expression
  do-something
end

I would use the value return by

expression

into the if clause. Does it exist a way to do this?

[Azzi Abdelmalek]

what do you mean, give an example

[Salvatore Mazzarino]

suppose that I have an expression like

setdiff(1:5, [2 3])

and I have to use this expression inside the if clause

Answer 1

[José-Luis]

I assume you mean something like, in C/C++ style

 if (++i == some_value){
  //do something with the new value of i
 }

Then, no, I don't think you can do that.

But you can always do

 your_val = expression
 if your_val == something %some condition
    %some operation on your_val
 end

[Salvatore Mazzarino]

yes exactly what I mean. I come from C so I used to do in that way. ok i will do how you have suggested me