# Algorithms and Data Structures

Algorithm -- briefly, is a step-by-step instruction that as a whole complete a process. Usually this process solves problems such as sorting , finding data, and many other problems. It can be thought of as a recipe, with each ingredient contributing to the whole food, thus solving your problem of hunger :)

## Examples of Algorithms

editLinear searching algorithm : A linear searching has O(n) time complexity. Lets step through a process of creating an algorithm for this problem.

**Steps:**

- We need a way to check through every element in the data. This can be done through a loop. A loop (ex, for loop , while loop) enables the programmer to run a block of code multiple times
- Each iteration we need to check if the value that we are searching for matches. If so then return that index.
- handle error, like what happens if the value we are searching for is not there ?

Since we have the step-by-step process written. We are able to effectively write an algorithm that follows the process above.

This function is written in C++.

int searchLinearly( int * Array, int MaxSize, int searchValue) { //Step # 1 - loop through every element if needed for(int i = 0; i < MaxSize; i++) { if( Array[i] == searchValue ) // Step # 2 -- search value return i; } return -1; //Step # 3 -- handle error if value not found }

So as you can see there is a step-by-step process in creating an algorithm. The above code could be written in template version but I chose not to for simplicity sake.

## See also

editWikibooks has a book on the topic of .Algorithms |

## Learning readings

edit### Wikipedia

edit## Data Structure Article

editComing soon.