Questions about Fractions and integers?

James deleted this, so I (Matt Fig) and rewriting it from memory.

How can I make a way to distinguish between integers and fractions?  For example, the output will say fraction if the input is a fraction and will say integer if the input is an integer.

[Walter Roberson]

Which of the two results would you like for (e.g.) 9/3 ?

[Daniel Shub]

I see the potential for an answer with an overloaded divide.

[Matt Fig]

Usually when a problem is solved, the asker chooses an answer that best suits their needs, rather than editing the question out of existence...

[Azzi Abdelmalek]

James, where is the question and the answer? when you post a question, the answer is useful for all members of this forum

[Matt Fig]

OP:

How can I make a way to distinguish between integers and fractions?  For example, the output will say fraction if the input is a fraction and will say integer if the input is an integer.

Answer 1

[José-Luis]

If integer, the following will return true:

floor(your_num) == your_num;

Otherwise, if the number has a fractional part, it will return false.

If you are talking about data type, Matlab is not a strongly typed language, and by default everything is a double. You can however define a number to have integer type

doc int32

and other flavors of integers.

Answer 2

[Matt Fig]

A = 9;  % Also try with A = 7/8;

if floor(A)==A
   disp('Integer')
else
   disp('fraction')
end

[Malcolm Lidierth]

How about A = NaN ?

Answer 3

[Daniel Shub]

You can test if a numeric input is an "integer" with validateattributes ...

function TF = mytest(x)
TF = false;
try
    validateattributes(x, {'numeric'}, {'integer'});
    disp('integer')
catch
    disp('fraction')
  TF = true;
end