C Program to Reverse a Number using Function

C Program to Reverse a Number:

#include<stdio.h>
#include<conio.h>
void main()
{
    int num, rev = 0, rem;
    printf("Enter the number to reverse: ");
    scanf("%d", &num);    
    while (num != 0){
        rem = num % 10;
        rev = rev * 10 + rem;
        num = num/10;
}    
printf("The reversed number is: %d", rev);
getch();
}

Output:

Enter the number to reverse: 71874
The reversed number is: 47817

C Program to Reverse a Number using Function:

#include<stdio.h>
#include<conio.h>
Reverse(int n)
{
   int sum=0;
   while (n!=0)
   {
     sum = sum*10 + n%10;
     n /= 10;
   }
   return sum;
}
void main()
{  
   int rev, num;
   clrscr();
   printf("Enter a Positive Number: ");
   scanf("%d", &num);
   rev = Reverse(num);
   printf("The Reverse of given number %d is: %d", num, rev);
   getch();
}

Output: