Number is palindrome or not

Posted on Apr 7, 2020

C program to check whether a number is palindrome or not.

A palindrome number is a number that is same after reverse. For example, 121, 272, 34643, 4554 are palindrome numbers.
To check if a number is palindrome or not, we reverse it and compare it with the original number. If both are the same, it's a palindrome otherwise not.
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Program 

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

    printf("Enter the number\t:");
    scanf("%d",&num);

    orig_num = num;
    rev_num = 0;
    while(num != 0)
    {
        rem = num % 10;
        rev_num = rev_num * 10 + rem;
        num = num / 10;
    }

    if(orig_num == rev_num)
        printf("Number entered is palindrome");
    else
        printf("Number entered is not a palindrome");
    getch();
}

Output 

********** Run1 ********** 

Enter the number        :456
Number entered is not a palindrome


********** Run2 ********** 

Enter the number        :1221
Number entered is palindrome