Program to implement linear search.

Sure, here is a step-by-step guide to implement linear search:

1. Start by defining a function called linear_search that takes two parameters: a list of elements and a target element to search for.

2. Inside the function, initialize a variable called index to -1. This variable will be used to store the index of the target element if found.

3. Use a for loop to iterate through each element in the list. For each iteration, compare the current element with the target element.

4. If the current element is equal to the target element, assign the index of the current element to the index variable and break out of the loop.

5. After the loop ends, check the value of the index variable. If it is still -1, it means the target element was not found in the list. In this case, return a message indicating that the element was not found.

6. If the index variable has a value other than -1, it means the target element was found. In this case, return the index of the target element.

7. Outside the function, create a list of elements to search through and a target element to search for.

8. Call the linear_search function with the list and target element as arguments.

9. Print the result returned by the linear_search function.

10. Run the program and check the output to see if the linear search is working correctly.

Here is an example implementation in Python:

def linear_search(elements, target):
    index = -1
    for i in range(len(elements)):
        if elements[i] == target:
            index = i
            break
    if index == -1:
        return "Element not found"
    else:
        return index

# Example usage
elements = [1, 2, 3, 4, 5]
target = 3
result = linear_search(elements, target)
print(result)

Output: 2

In this example, the linear_search function is used to search for the target element 3 in the list [1, 2, 3, 4, 5]. The function returns the index of the target element, which is 2.