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Python | Linear search on list or tuples

Last Updated : 13 Mar, 2023
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Let us see a basic linear search operation on Python lists and tuples. A simple approach is to do a linear search, that is 

  • Start from the leftmost element of the list and one by one compare x with each element of the list.
  • If x matches with an element, return True.
  • If x doesn’t match with any of the elements, return False.

 Example #1: Linear Search on Lists 

Python




# Search function with parameter list name
# and the value to be searched
  
  
def search(List, n):
  
    for i in range(len(List)):
        if List[i] == n:
            return True
    return False
  
  
# list which contains both string and numbers.
List = [1, 2, 'sachin', 4, 'Geeks', 6]
  
# Driver Code
n = 'Geeks'
  
if search(List, n):
    print("Found")
else:
    print("Not Found")


Output:

Found

Note: that lists are mutable but tuples are not. 

Example #2: Linear Search in Tuple 

Python




# Search function with parameter tuple name
# and the value to be searched
  
  
def search(Tuple, n):
  
    for i in range(len(Tuple)):
        if Tuple[i] == n:
            return True
    return False
  
  
# Tuple which contains both string and numbers.
Tuple = (1, 2, 'sachin', 4, 'Geeks', 6)
  
  
# Driver Code
n = 'Geeks'
  
if search(Tuple, n):
    print("Found")
else:
    print("Not Found")


Output:

Found


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