#include<iostream>
using namespace std;
int main() {
  int n;

  cout << "Enter an integer: ";
  cin >> n;

  if ( n % 2 == 0)
    cout << n << " is even.";
  else
    cout << n << " is odd.";

  return 0;
}
    

 
#include<iostream>
using namespace std;
int main() {
  int year;
    cout<<"Enter the Year: ";
    cin>>year;
    if((year%4==0) && (year%100!=0))
        cout<<"\nIt is a Leap Year";
    else if(year%400==0)
        cout<<"\nIt is a Leap Year";
    else
        cout<<"\nIt is not a Leap Year" << endl;

  return 0;
}
    

 
#include<iostream>
using namespace std;
int main() {
  float n1, n2, n3;

    cout << "Enter three numbers: ";
    cin >> n1 >> n2 >> n3;

    if(n1 >= n2 && n1 >= n3)
        cout << "Largest number: " << n1;

    else if(n2 >= n1 && n2 >= n3)
        cout << "Largest number: " << n2;
    
    else
        cout << "Largest number: " << n3;

  return 0;
}
    

 
#include<iostream>
using namespace std;
int main() {
char op;
double n1,n2;
cout<<"Enter the Operator ( +, -, *, /)";
cin>>op;
cout<<"Enter two numbers";
cin>>n1>>n2;
switch(op)
{
case '+':
cout<< n1 << " + "<< n2<< " =" <<(n1+n2);
break;
case '-':
cout<< n1 << " - " << n2 << "="<<(n1-n2);
break;
case '*':
cout<< n1 << " * " << n2 << "= " <<(n1*n2);
break;
case'/':
if( n2!=0.0)
cout<< n1<<" / "<< n2<< " = "<<(n1/n2);
else
cout<< "its divide by zero situation";
break;
default:
cout<< op <<" is an invalid operator";
}
return 0;
}
    

 
#include<iostream>
using namespace std;
int main() 
{
int n, sum = 0;

    cout << "Enter a positive integer: ";
    cin >> n;

    for (int i = 1; i <= n; i++) 
       {
        sum += i;
    }

    cout << "Sum = " << sum;

  return 0;
}
    

 
#include<iostream>
using namespace std;
int main() 
{
int i,num,fact;

fact=1;

cout<<"/n Enter a Number:";

cin>>num;

for(i=1;i<=num;i++)

fact=fact*i;

cout<<" factorial of "<< num<<"is"<< fact;

  return 0;
}
    

 
#include<iostream>
using namespace std;
int main() 
{
int n;

    cout << "Enter a positive integer: ";
    cin >> n;

    for (int i = 1; i <= 10; i++) 
       {
        cout << n << " * " << i << " = " << n * i << endl;
    }

  return 0;
}