isinteger

Determine if a real number is an integer type.

TF = isinteger(2)

TF = logical
   0

MATLAB® stores a real number as a double type by default.

Convert the number to a signed 8-bit integer type using the int8 function. Check if it is an integer type.

TF = isinteger(int8(2))

TF = logical
   1

Determine if a complex number is an integer type.

A = 3.5 - 2.5i

A = 
3.5000 - 2.5000i

TF = isinteger(A)

TF = logical
   0

MATLAB stores a complex number as a double type by default.

Convert the complex number into a signed 32-bit integer type using the int32 function. Check if it is an integer type.

B = int32(A)

B = int32

4 -    3i

TF = isinteger(B)

TF = logical
   1

When a number with decimal digits is converted to an integer type, MATLAB rounds it to the nearest integer.

Determine if an array containing integer numbers is an integer type.

Create an array using the int8 function. Check if it is an integer type.

A = [int8(1:5)]

A = 1×5 int8 row vector

   1   2   3   4   5

TF = isinteger(A)

TF = logical
   1

Now, create a cell array that contains the array A and other integer numbers. Use class to identify the type of the cell array. Check if it is an integer type.

B = {A int8(-4); int8(2) int8(1)}

B=2×2 cell array
    {[1 2 3 4 5]}    {[-4]}
    {[        2]}    {[ 1]}

type = class(B)

type = 
'cell'

TF = isinteger(B)

TF = logical
   0

The cell array is not an integer type since it is a cell type.