C++ program to check number is palindrome or not using Function

What are Functions ?

Function is a block of statements that performs some operations. All C++ programs have at least one function – function called “main()”. This function is entry-point of your program.

A function declaration tells the compiler about a function’s name, return type, and parameters. A function definition provides the actual body of the function.

Defining a Function : :

The general form of a C++ function definition is as follows:

return_type Function_Name( list of parameters )
{
//function’s body
}

• return_type : suggests what the function will return. It can be void, int, char, some pointer or even a class object.
• Function_Name : is the name of the function, using the function name it is called.
• Parameters : are variables to hold values of arguments passed while function is called. A function may or may not contain parameter list.
• Function body : is he part where the code statements are written.

Below is the source code for C++ program to check number is palindrome or not using Function which is successfully compiled and run on Windows System to produce desired output as shown below :

SOURCE CODE : :

/*  C++ program to check number is palindrome or not using Function  */

#include<iostream>
using namespace std;

void rev(int);

int main()
{
        int n;
        cout<<"Enter any number :: ";
        cin>>n;
        rev(n);
}

void rev(int n)
{
        int n1,d,rn=0;
        n1=n;

        while(n>0)
        {
                d=n%10;
                rn=(rn*10)+d;
                n/=10;
        }

        if(n1==rn)
        cout<<"\nThe Number [ "<<n1<<" ] is a Palindrome no.\n";
        else
        cout<<"\nThe Number [ "<<n1<<" ] is NOT a Palindrome no.\n";

}

OUTPUT : :

/*  C++ program to check number is palindrome or not using Function  */

Enter any number :: 123321

The Number [ 123321 ] is a Palindrome no.

Process returned 0

Above is the source code for C++ program to check number is palindrome or not using Function which is successfully compiled and run on Windows System.The Output of the program is shown above .