# Linear Search

#### In this tutorial, you will learn about linear search. Also, you will find working examples of linear search in Python.

Linear search is the simplest searching algorithm that searches for an element in a list in sequential order. We start at one end and check every element until the desired element is not found.

## How Linear Search Works?

The following steps are followed to search for an element `k = 1` in the list below.

1. Start from the first element, compare k with each element x.
2. If `x == k`, return the index.

## Linear Search Algorithm

```LinearSearch(array, key)
for each item in the array
if item == value
return its index```

## Python Examples

``````/* Linear Search in Python */

def linearSearch(array, n, x):

/* Going through array sequentially */
for i in range(0, n):
if (array[i] == x):
return i
return -1

array = [2, 4, 0, 1, 9]
x = 1
n = len(array)
result = linearSearch(array, n, x)
if(result == -1):
else:
print("Element found at index: ", result)``````

## Linear Search Complexities

Time Complexity: O(n)

Space Complexity: `O(1)`

## Linear Search Applications

1. For searching operations in smaller arrays (<100 items).

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There are two sides to machine learning:

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