How can I write a program that indicates a number if it is integer or not?

How can I write a program that indicates a number if it is integer or not?

Answer 1

[James Tursa]

doc floor
doc ceil
doc round

What happens if you use one of these functions and compare the result to the original value?

Answer 2

[Roger Stafford]

If n is your number, then

round(n)==n

is true if and only if n is an integer

Answer 3

[Star Strider]

Use the rem (link) or mod (linked to in that page) functions.

isint = @(x) rem(x,1) == 0;

It returns a logical result.