A simple program to ask the user to give a number and then the program will check if  the given number is an odd or even number using boolean function in C++ programming.

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Program Listing
#include <iostream>
#include <cstdlib>

using namespace std;

bool isEven (int num);

int main()

     int val=0;
     cout <<"\n\n";
     cout << "\tOdd and Even Number in C++ Using Boolean Function";
     cout <<"\n\n";
     cout << "\tGive a Number: ";
     cin >> val;
     cout <<"\n\n";
     if ( isEven ( val ) )
          cout <<"\t" <<val << " is even number.";
          cout <<"\t" << val << " is odd number.";
      cout <<"\n\n";
     return 0;
bool isEven ( int num )
     if ( num % 2 ) return false ;
     else return true; 

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