Linear (Sequential) Search and Its Usage in python

Linear (Sequential) Search and Its Usage in python

Problem: Explain the concept of a linear (sequential) search in computer science. Provide an example of how to perform a linear search in Python and discuss its usage and limitations.
Solution:A linear search, also known as a sequential search, is a simple algorithm used to find a specific element in a list or array by iterating through the elements one by one until the target element is found or until the entire list is exhausted.
Here's an example of how to perform a linear search in Python:
Represents whole numbers (positive, negative, or zero).
def linear_search(arr, target) :
    for i, element in enumerate(arr) :
        if element == target:
            return i # Return the index of the target if found
    return -1 # Return -1 if the target is not found

# Example usage:

my_list = [10, 25, 4 , 8 , 30, 15]
target_element = 8
result = linear_search(my_list, target_element)

if result != -1 :
    print(f" Element {target_element} found at index {result} . " )
    print(f" Element {target_element} not found in the list. " )
Linear search is straightforward and suitable for small to moderately sized lists or arrays. It's easy to implement and does not require the data to be sorted. Some common use cases include:

l. Searching Unsorted Data: When you need to find an element in an unsorted collection of data, a linear search is aviable option.

2. Finding the First Occurrence: Linear search is useful for finding the first occurrence of an element in a list.

3. lmplementing Other Search Algorithms: Linear search is often used as a build ing block in more complex search algorithms, such as binary search.

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