What is search algorithm?
A search algorithm is the step-by-step procedure used to locate specific data in a collection of data. It is considered to be a fundamental procedure in IT. In computer science, the difference between a fast application and a slower one when searching for data is often the use of the right search algorithm.
All search algorithms use a search key to proceed with the procedure. Search algorithms are expected to return a success or failure status, which is usually indicated as Boolean true / false. Various search algorithms are available, and their performance and efficiency will depend on the data and the way in which it is used.
A linear search algorithm is considered to be the most basic of all search algorithms. Binary search is perhaps best. There are other search algorithms such as the depth search algorithm, the width algorithm, etc. The efficiency of a search algorithm is measured by the number of times a worst case comparison of the search key is performed. The notation used in search algorithms is O (n), where n is the number of comparisons made. There is the idea of the asymptotic upper limit of the execution time required for the algorithm in relation to a given condition.
Search cases in search algorithms can be categorized as best case, average case and worst case. In some algorithms all three cases could be asymptotically the same, while in some other cases there could be a big difference. The average behavior of the search algorithm helps determine the usefulness of the algorithm.