How to make a variable an even number?

if i have variable an even number is there any direct command can be used please mention with an example

Answer 1

[madhan ravi]

Is your question "How to check if a variable consists of even numbers?"

Google "even number mod matlab"

[Ali Mukhtar]

it only tells how we can check i want to make it even value i have already seen it

[madhan ravi]

So what is the question if you want to make a variable consisting of even numbers then:

x = 1:3 ; % an example
X = [x,zeros(mod(numel(x),2))] % if the variable is odd then the last element is appended as zero, is this what you want?

[Ali Mukhtar]

No i want to just check two variables S and P

If S< P then make P an even number

[madhan ravi]

Are you inducing me to write a full code for your homework?, well then I am sorry. I have suggested a solution to make a variable containing even number of elements. Your professor/teacher can easily find this forum as you did, so finally I'm not the one who's going to into trouble :/

[madhan ravi]

Ali Mukhtar comments:

no sir thats not the case , this my own work not any assignment. and thanks for your help i have solved the problem... can you please tell how can we display simulink fuction values in matlab command window?

[madhan ravi]

I don't have enough experience with Simulink.

[Ali Mukhtar]

ok np

Answer 2

[John D'Errico]

If you just want to check if a variable X is an even number, then just check the value of mod(x,2). If the result is zero, then X was even.

X = randi(10,1,5)
X =
     4    10     8     9     7

mod(X,2)
ans =
     0     0     0     1     1

So the first three elements of X were even numbers, because the modulus base 2 were zero for those elements. Here, zero tell you even. 1 tells you odd. If you want a result that is true for even numbers, then do something like this:

mod(X,2) == 0
ans =
  1×5 logical array
   1   1   1   0   0

As you can see, the result is now true for the even numbers.

If you want to see if all, or any of them were even, then do one of these as appropriate:

all(mod(X,2) == 0)
ans =
  logical
   0
   
any(mod(X,2) == 0)
ans =
  logical
   1

So they were not all even, but SOME of them were even.

[madhan ravi]

+1 , smooth and informative explanation as always :)