Check if a number is whole number or decimal number

Question

how to check if the entered number by user is decimal or whole number?

Answer 1

if number%1==0 it is whole

Answer 2

% operator is for integers only. It's double counterpart is fmod.

Another way is to compare the number with it's floor:
if (floor(x) == x)
// x is whole
Both floor and fmod are included in <cmath>

Answer 3

thanks

Answer 4

if(number%1==0)

Answer 5

thanks

Answer 6

(int)n==n