C Program to Check If a Number is Palindrome or Not

A palindromic number (also known as a numeral palindrome or a numeric palindrome) is a number that remains the same when its digits are reversed. Like 16461, for example, it is "symmetrical". The term palindromic is derived from palindrome, which refers to a word (such as rotor or racecar) whose spelling is unchanged when its letters are reversed. The first 30 palindromic numbers (in decimal) are:

0, 1, 2, 3, 4, 5, 6, 7, 8, 9, 11, 22, 33, 44, 55, 66, 77, 88, 99, 101, 111, 121, 131, 141, 151, 161, 171, 181, 191, 202, … 

PROGRAM:

#include<stdio.h>

#include<conio.h>

void main()

{

int n,n1,r,r1=0;

clrscr();

printf("enter a number");

scanf("%d",&n);

n=n1;

while(n>0)

{

r=n%10;

r1=r1*10+r;

n/=10;

}

if(n1==r1)

{

printf("number is palindrome");

}

else

{

printf("number is not palindrome");

}

getch();

}

output:
n=151
number is palindrome

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