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C++ program to check Palindrome number

C++ program to check Palindrome number


In this chapter of C++ program tutorial out task is: 

  • write a c++ program to check whether a number is palindrome or not using function

C++ program to check Palindrome number

Below is the c++ program to check whether a number is palindrome or not using if statement and loop.

/*  Program Name : To check whether a number is Palindrome or not
    Program Author : Sayantan Bose
*/

#include <iostream>
#include <math.h>
using namespace std;

//This function returns number we get by reversing the inputed number.
int palindrome(int num)
{
    int r=0,sum=0,i,c;
    string n = to_string(num);
    c=n.size();
    c=(pow(10,c))/10;
 while(num!=0)
    {
        r=num%10;
        sum=sum+r*c;
        num=num/10;
        c=c/10;

    }
  return sum;
}

// This is the main function
int main() {

int num,sum=0;
    cout<<"Enter any number to check Palindrome:\n";
    cin>>num;
    int new_num;
    new_num=num;
 sum=palindrome(num);
  if(sum==new_num)
        cout<<num<<" is a Palindrome number";
    else
        cout<<num<< " is not a Palindrome number";

	return 0;
}

OUTPUT

Enter the number to check Palindrome:
121
121 is an Palindrome number
Or
Enter the number to check Palindrome:
53
53 is not an Palindrome number

EXPLANATION :
In the above c++ program to check whether a number is palindrome or not using function:
  • A number is said to be Palindrome if and only if the reverse of the number is equal to the number itself.
  • For example: 121 is a Palindrome number. Because 121 when reversed gives 121  which is the number itself.   
  • In the method palindrome, we are calculating the length of the number by converting it into a string. The number is reversed using the above logic and the reversed number is then returned to the main method.
  • In the main method the reversed number is then compared with the original number provided as input.
  • If both of them turn out to be equal the number is a Palindrome number else it isn't.
You can see the above code execution and output in codeblocks IDE:
 
c++ program to check whether a number is palindrome or not using function

 


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About the Author
Sayantan Bose
- šŸ”­ Iā€™m currently working on DS Algo skills - šŸŒ± Iā€™m currently learning web develeopement - šŸ‘Æ Iā€™m looking to collaborate with Oppia - šŸ“« Reach me at https://www.linkedin.com/in/sayantan-bose-14134a1a6/ - šŸ˜„ Pronouns: his/him
Page Views :    Published Date : Dec 18,2020  
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