How do I use a single or double pipe (vertical line) in an "or" statement?

I have the following code

if k==39 or K==90
do that
else
do that
end

My question is how to replace the or statement

With | or with the double vertical line

Answer 1

[Luffy]

 if k==39 || K==90
 do that
 else
 do that
 end

[Sabbas]

thanks luffy

Answer 2

[Daniel Shub]

There are two main differences between | and . The first difference is that "short circuits", while | does not. This means that you can save yourself 1 comparison every time the if statement is evaluated. Assuming equal over head for | and , this means you can save some computation time. How much time you save depends on what proportion of the time your code spends checking for k equal to 39 takes. The second difference is that is a relatively new addition to MATLAB. I cannot easily find when they were introduced ( Loren's blog uses them in 2006). If you want your code to work with older versions of MATLAB, you cannot use .

Since I doubt that k==90 will be the bottle neck in your code, I would go with | for backwards compatibility.

[Jan]

|| works at least since Matlab 6.5.

[Sabbas]

So the bottom line is that i can still use the double vertical line ?