In this article, I will introduce you to the linear search algorithm using the C ++ programming language. A linear search is one of the most basic and useful algorithms, it moves sequentially through a data structure to find the corresponding value this is the reason why it is also known as the sequential search algorithm.

Before implementing the linear search using the C++ programming language, letâ€™s first understand how linear search works.

## How Linear Search Algorithm Works?

The linear search algorithm can be compared to looking for a book in a stack of books, you go through them all until you find the one that you want. Letâ€™s understand it with a more simple example explained below.

Think of the linear search algorithm as a way to find your way through a contact list on your smartphone. A linear search begins at the beginning by reading each name until you find what you are looking for. In n terms of complexity, this is an O(n) search â€“ the time it takes to search the list increases as the contact list increases.

Letâ€™s understand the searching approach of linear search algorithm step by step:

- It starts the search from the leftmost element of the array and compares one by one the element we are looking for with each element in the array.
- If it finds a match between the searched element and the elements in the array, it returns the index of that element.
- If there is no match between the searched element and the elements of the array, then it returns -1.

## Linear Search in C++ Programming Language

Now letâ€™s see how to implement the linear search using the C++ programming language. The code below follows all the steps that I have mentioned above:

Output: 5 10 20 30 40 50 40 3

## Conclusion

Linear search is a very simple searching algorithm. It cycles through the elements until the query is found, making it a linear algorithm. Its complexity is O (n), where n is the number of elements to iterate.

So this is how to implement the linear search algorithm by using the C++ programming language. If you want to learn its implementation by using the Python programming language, you can check this article.

I hope you liked this article on linear search in C++ programming language. Feel free to ask your valuable questions in the comments section below.