i want to execute if else statement using size of array or matrix?

For example:

    if size(A)=4*3                       % 4*3 is row*column
    fprintf ("something")
    else
    fprintf ("nothing")

then what is the correct way to execute such problem?

Answer 1

[Matt J]

    if isequal(size(A),[4,3])                     
     fprintf ("something")
    else
     fprintf ("nothing")
    end

Answer 2

[Matt J]

Using the attached utility,

    if equalldims(size(A),[4,3])                     
     fprintf ("something")
    else
     fprintf ("nothing")
    end

This is a little more bulletproof, dealing with things like trailing ones that shouldn't affect the comparison,

    >> equaldims(size(rand(4,3)),  [4,3,1,1,1,1,1,1])

    ans =

      logical

       1