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Linear Search

Linear Search is a method of searching an element in a list. It is the simplest searching algorithm in which the element is searched in a sequential manner. Each element of the data structure is compared with the key(element to be searched) in a sequential order until the element is found or the last index is visited.

Illustration:


Algorithm:

LinearSearch(list,key)
    for each_item in list
        if(item==key)
            return item_index
    return -1

Linear Search Time Complexity:
  • Best Case : O(1)
  • Average Case : O(n)
  • Worst Case : O(n)
Space complexity: O(1)

Program for Linear Search


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