Reverse an integer number using function

#include<stdio.h>
int reverseNum(n)
{
    int rev=0,rem;
    while(n!=0)
    {
        rem=n%10;
        rev=rev*10+rem;
        n=n/10;
    }
    return rev;
}
int main()
{
    int n,rev;
    scanf("%d",&n);
    rev=reverseNum(n);
    printf("%d\n",rev);
    return 0;
}