how to do if command in c++

If Command in C++

#include <iostream>
using namespace std;

int main() {
  int x = 10;

  if (x > 5) {
    cout << "x is greater than 5" << endl;
  } else {
    cout << "x is not greater than 5" << endl;
  }

  return 0;
}

1. Include the necessary header file: #include <iostream> includes the input/output stream library, allowing us to use the cout and endl statements.

2. Declare the namespace: using namespace std; allows us to use objects and functions from the standard C++ library without having to specify the namespace explicitly.

3. Define the main function: int main() { ... } is the entry point of the program.

4. Declare and initialize a variable: int x = 10; declares an integer variable x and initializes it with the value 10.

5. Use the if statement: if (x > 5) { ... } else { ... } checks if the condition x > 5 is true. If it is true, the code block inside the if statement is executed; otherwise, the code block inside the else statement is executed.

6. Print the result: cout << "x is greater than 5" << endl; and cout << "x is not greater than 5" << endl; are used to print the corresponding messages based on the condition.

7. Return from the main function: return 0; indicates successful program execution and is returned to the operating system.