Question

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

Answer 1

#include <stdio.h>

int main() {

   int n, reversedN = 0, remainder, originalN;

   printf("Enter an integer: ");

   scanf("%d", &n);

   originalN = n;

   // reversed integer is stored in reversedN

   while (n != 0) {

       remainder = n % 10;

       reversedN = reversedN * 10 + remainder;

       n /= 10;

   }

   // palindrome if orignalN and reversedN are equal

   if (originalN == reversedN)

       printf("%d is a palindrome.", originalN);

   else

       printf("%d is not a palindrome.", originalN);

   return 0;

}

Answer 2

Answer:

Program code:

#include<stdio.h>  

int main()    

{    

int n,r,sum=0,temp;    

printf("enter the number=");    

scanf("%d",&n);    

temp=n;    

while(n>0)    

{   

r=n%10;    

sum=(sum*10)+r;    

n=n/10;    

}    

if(temp==sum)    

printf("palindrome number ");    

else    

printf("not palindrome");   

return 0;  

}   

Output:

enter the number=151

palindrome number

enter the number=5621

not palindrome number

:))