Palindrome Number Solution in C Programming Coding Example - Many examples in C for Palindrome check

Algorithm


How to check if a given number is palindrome or not algorithm:

  1. Declare two variables:
    1. one variable store the given number
    2. the other variable stores the reversed number.
  2. Run a for loop or do-while loop
    1. until the number of digits in the reversed number is equal to the number of digits in the given number.
  3. The reversed number is created by splitting off the end-digit of the given number.
  4. Check if the reversed number is equal to the given number.

 

Palindrome Numbers are - 

  1. 12321 is a palindrome number
  2. 12345 is not a palindrome number
  3. 1234321 is a palindrome number
  4. 121 is a palindrome number

 

Code Examples

#1 C Program to check if a number is palindrome or not

Code - C Programming

#include <stdio.h>
int main()
{

    int number, i, reverseNumber = 0;
    
    printf("Enter a number: ");
    scanf("%d", &number);
    
    for(i = number; i !=0; i)
    {
        reverseNumber = reverseNumber * 10;
        reverseNumber = reverseNumber + i % 10;
        i = i / 10;
    }
    
    if(number == reverseNumber){
        printf("Yes, this is a Palindrome Number");
    } else {
        printf("No, this is not a Palindrome Number");
    }
    
    return 0;
}
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Input

x
+
cmd
12321

Output

x
+
cmd
Yes, this is a Palindrome Number

#2 Palindrome Number check in C programming using While Loop

Code - C Programming

#include <stdio.h>
int main()
{
    int number, i, reverseNumber = 0;
    
    printf("Enter a number: ");
    scanf("%d", &number);
    i = number;
    
    while (i != 0) {
        reverseNumber = reverseNumber * 10;
        reverseNumber = reverseNumber + i % 10;
        i = i / 10;
    }
    
    if(number == reverseNumber){
        printf("Yes, this is a Palindrome Number");
    } else {
        printf("No, this is not a Palindrome Number");
    }
    
    return 0;
}
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Input

x
+
cmd
12345

Output

x
+
cmd
No, this is not a Palindrome Number

#3 Palindrome Checker in C Using Function C Programming Example

Code - C Programming

#include <stdio.h>

int checkPalindrome(number){
    int i = number, reverseNumber = 0;
    
    while (i != 0) {
        reverseNumber = reverseNumber * 10;
        reverseNumber = reverseNumber + i % 10;
        i = i / 10;
    }
    
    if(number == reverseNumber){
        return 1;
    }
    
    return 0;
}

int main()
{

    int number;
    
    printf("Enter a number: ");
    scanf("%d", &number);
    
    
    if(checkPalindrome(number)){
        printf("Yes, this is a Palindrome Number");
    } else {
        printf("No, this is not a Palindrome Number");
    }
    
    return 0;
}
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Input

x
+
cmd
12321

Output

x
+
cmd
Yes, this is a Palindrome Number

Demonstration


It's a very simple concept to get the palindrome of any given number. Check the algorithm.

 

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