Linear Search Definition
Linear search also called sequential search is a type of search algorithms, that traverse an array and compare each item with the wanted item, if the item is found the algorithm returns his index otherwise, It returns a false value (false, null, None...)
Space and Time complexity of linear search
The time complexity of linear search is O(n) and his Space complexity is O(1)
Implementaion of linear search in python
def LinearSearchAlgorithm(wantedItem,items: list):
"""
Linear seach algorithm
input:
[wantedItem]
[items] {list}
output:
=> returns index if the item is found
=> returns False if the item is not found
"""
for i in range(len(items)):
if wantedItem == items[i]:
return i
return False
Implementaion of linear search in javascript
/**
* Linear Search ALgoritm
* @param wantedItem
* @param {Array} items
* @returns {(Number|Boolean)} returns index if the item is found else returns false.
*/
const LinearSearchAlgorithm = (wantedItem, items) => {
for (let i = 0; i < items.length; i++){
if (wantedItem == items[i]) return i;
};
return false;
}
Exercise
Write a program that returns True if user's child can enter primary school if not returns False
Permited Ages to enter primary school: 5,6,7,8 (Array | list).
input : child's age (integer).
example 1
input : 7
output => True
example 2
input : 3
output => False
References and useful Resources
- https://www.bbc.co.uk/bitesize/guides/z7kkw6f/revision/7#:~:text=A%20linear%20search%20is%20the,algorithm%20must%20deal%20with%20this.
- https://www.geeksforgeeks.org/linear-search/
- https://en.wikipedia.org/wiki/Linear_search
- https://www.tutorialspoint.com/data_structures_algorithms/linear_search_algorithm.htm
- https://www.geeksforgeeks.org/linear-search/
- https://www.tutorialspoint.com/linear-search-in-python-program
- https://www.youtube.com/watch?v=iwo5WAldDks
- https://www.youtube.com/watch?v=4GPdGsB3OSc
#day_5
Top comments (1)
Here is the another useful reference for Linear Search Algorithm - scaler.com/topics/data-structures/...