Loop Object In C++

C++ is a high-level programming language that empowers developers to control system level resources and services. Understanding loops is an integral part of mastering this language, and this article will help provide some insight into exactly how loop objects function in C++.

Code snippet: Working with while loop in C++

Before diving into the explanation, let’s take a look at the example code:

#include<iostream>
using namespace std;

int main() {
    int i = 0;
    while (i < 5){
        cout << i << "\n";
        i++;
    }
    return 0;
}

Code Explanation for: Working with while loop in C++

In this code snippet, we are implementing a simple while loop in C++. Let’s go over it step by step.

1. #include<iostream>: This preprocessor command tells the compiler to include the iostream standard file. This file contains code allowing the user to input and output data, specifically using cout.

2. using namespace std;: This line enables us to use functions that are in the standard library, without referring to it specifically.

3. int main(): This line starts the main function. This is where all the core activity of the program is concentrated.

4. int i = 0;: We are declaring and initializing an integer variable i to 0.

5. while(i < 5): This is where the while loop begins. The condition within the brackets means the loop will run as long as the value of i is less than 5.

6. cout << i << "\n";: This line is executed in each iteration of the loop. It prints the current value of i, followed by a newline.

7. i++;: This line increments the value of integer i by 1 in each loop iteration.

8. return 0;: Returns zero to show that the program ran as expected.

With each repetition of the loop, the value of i will be outputted to the console, then incremented. Once i has reached 5, the condition in the while loop (i < 5) will no longer be true, and the program will break out of the loop, returning 0 and ending the program.