Check If Two Lists Have At-least One Element Common In Python

Chapter: Python Last Updated: 17-05-2023 15:25:08 UTC

Program:

            /* ............... START ............... */
                def have_common_element(list1, list2):
    for element in list1:
        if element in list2:
            return True
    return False


# Example usage
list1 = [1, 2, 3, 4, 5]
list2 = [6, 7, 8, 9, 10]
has_common = have_common_element(list1, list2)

if has_common:
    print("The lists have at least one common element.")
else:
    print("The lists do not have any common elements.")

                /* ............... END ............... */
        

Output

If list1 and list2 have at least one common element:

Output : The lists have at least one common element.

If list1 and list2 do not have any common element:

Output : The lists do not have any common elements.

Notes:

  • In this program, the have_common_element function takes two lists (list1 and list2) as arguments. It uses a for loop to iterate over each element in list1. For each element, it checks if that element is present in list2 using the in operator. If a common element is found, it immediately returns True. If the loop completes without finding any common element, it returns False.
  • The program demonstrates the usage of the function by checking if list1 and list2 have at least one common element. Based on the result, it prints the appropriate message.
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