What is palindrome number in C?

Article by: Manish Methani

Last Updated: September 27, 2021 at 2:04pm IST
1 min 33 sec

In this article, we are going to cover the following points

1. What is Palindrome number in C?
2. Algorithm of Palindrome number
3. Implementation of Palindrome Program

Palindrome numbers are referred to as those numbers which give the same number after reversing that number.

For example: Suppose a given number is 1551, then the palindrome number of the given number will be 1551.

2) Palindrome number of 343 will be 343.

Algorithm for Palindrome number in C

Lets write the basic algorithm to check whether the given number is palindrome or not.

1. Get the number as input from the user.
2. Hold the given number in a new temporary variable.
3. Reverse the given number.
4. Compare the temporary number with a reversed number.
5. If both the temporary number and reverse numbers are the same, then the given number will be palindrome else number is not a palindrome.

Implementation of Algorithm

Write a program to reverse a number and check whether a given number is palindrome or not.

#include
 int main() 
 {
int i=1551,j;
j = i;
int n,rem,quo,newnumber=0;
for(n=1;n<=4;n++)
{

rem=i%10;

if(n == 4)
{                    
newnumber=(newnumber+rem);
}
else
{
newnumber=(newnumber+rem)*10;
}
quo=i/10;
i=quo;


}

printf("
New number = %d",newnumber);
printf("
Old number = %d",j);


if(j == newnumber)
{
   printf("
Palindrome");
}
else
{
   printf("
Not Palindrome");

}
}

Output

New number = 1551
Old number = 1551
Palindrome