Write a C program to check whether a number is a palindrome or not, In this C program example, we will see how to check whether a number is a palindrome or not by using for loop and while loop in the array.

What is a palindrome number?

Those number that remains same whenever we applied to reverse of number is known as a palindrome number, for example, 121 is a number, and in the reverse case, it remains same 121, then now 121 is a palindrome number and we will other examples input, which is given below.

Sample Input – 1

enter the numbers: 1235321

Sample output

the reverse of numbers: 1235321

it is a palindrome number.

Sample Input – 2

enter numbers: 14562

Sample output

the reverse of numbers: 26541

it is not a palindrome number.

Algorithm to check whether a number is palindrome or not

• Declare one array and four variables.
• Take the input for getting numbers from users.
• Then, take two for loop, one while loop, and the if-else statement.
• Print with a appropriate message in statements.

C program to check whether a number is palindrome or not

#include<stdio.h>
void main (){
    int i,a[10],n,r,sum;
    printf("enter numbers:");
    for(i=0;i<1;i++){
        scanf("%d",&a[i]);
       }
    for(i=0;i<1;i++){
        n=a[i];
        sum=0;
    while(n>0){
        r=n%10;
        sum=sum*10+r;
        n=n/10;
    }
    printf("reverse of numbers :%d \n",sum);
    if(sum==a[i]){
        printf("it is palidrome number\n");
    }
    else{
        printf("it is not a polidrome number");
         }		
     }
}

Explanation of this C program

Step 1: Start.

Step 2: Create a header file and include the library in it.

Step 3: Create void main function.

Step 4: Declare one array a[1] and four variable (i,n,sum,r).

Step 5: Create input with help of scanf for taking numbers from the user, and create input in for loop.

Step 6: Create two for loop, first for input and in another for loop create while loop forgives the reverse logic (r=n%10, sum=sum*10+r, n=n/10) to check palindrome.

Step 7: Then, create if-else statement, in if statement give condition (sum==a[i]), to print it is a palindrome number.

Step 8: In else statement, to print it is not a palindrome number.

Step 9: Print appropriate messages with the help of printf.

Step 10: End.

The output of this C program

In this way, we learned how to write a C program to check whether a number is a palindrome or not