Reverse of a five digit number

Posted on Apr 3, 2020

If a five-digit number is input through the keyboard, write a program in C to reverse the number.

Program

#include<stdio.h>
#include<conio.h>
void main()
{
long int num, rev_num;
int next;

printf("Enter a five digit number\t:");
scanf("%ld", &num);

rev_num = num % 10;
next = (num / 10) % 10;
rev_num = (rev_num * 10) + next;
next = (num / 100) % 10;
rev_num = (rev_num * 10) + next;
next = (num / 1000) % 10;
rev_num = (rev_num * 10) + next;
next = (num / 10000) % 10;
rev_num = (rev_num * 10) + next;

printf("Reversed number is = %ld",rev_num);

getch();
}

Output

Enter a five digit number       :23456
Reversed number is = 65432

Explanation