Examples of if else in c++ programming

How to Write a Program to check whether an integer is positive, negative or zero :

#include <iostream>
using namespace std;

int main()
{
  int number;
  cout << "Enter an integer: ";
  cin >> number;
  if (number > 0) 
   {
    cout << "You entered a positive integer: " << number << endl;
   } 
  else if (number < 0) 
   {
    cout << "You entered a negative integer: " << number << endl;
   } 
  else 
   {
    cout << "You entered 0." << endl;
   }
     return 0;
}

Example of how to Write a Program to print positive number entered by the user If the user enters a negative number, it is skipped:

#include <iostream>
using namespace std;

int main() {

  int number;

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

  // checks if the number is positive
  if (number > 0) 
  {
    cout << "You entered a positive integer: " << number << endl;
  }

  cout << "This statement is always executed.";

  return 0;
}

Example of write a program to know the day of the week :

#include<iostream>
using namespace std;
int main()
{
    int x;
    cout << "Enter the number from 1 to 7 to know what is this day: ";
    cin >> x;
    if (x == 1)
        cout << "sunday";
    else if (x == 2)
        cout << "monday";
    else if (x == 3)
        cout << "tuesday";
    else if (x == 4)
        cout << "wednesday";
    else if (x == 5)
        cout << "thursday";
    else if (x == 6)
        cout << "friday";
    else if (x == 7)
        cout << "saturday";
    return 0;

}

 Example :

Find the biggest number of 3 numbers

#include
using namespace std;
int main()
{
    int x, y, z;
    cout << "Enter the first number: ";
    cin >> x;
    cout << "Enter the second number: ";
    cin >> y;
    cout << "Enter the third: ";
    cin >> z;
    if (x > y && x>z)
        cout << "the largest number is: " << x<<endl;
    else if(y>x && y>z)
        cout << "the largest number is: " << y<<endl;
    else
           cout << "the largest number is: " << z << endl;
    return 0;

}