Python: Find whether a given array of integers contains any duplicate element

Last update on December 27 2024 13:24:10 (UTC/GMT +8 hours)

Write a Python program to find out if a given array of integers contains any duplicate elements. Return true if any value appears at least twice in the array, and return false if every element is distinct.

Sample Solution:

Python Code :

def test_duplicate(array_nums):
    nums_set = set(array_nums)    
    return len(array_nums) != len(nums_set)     
print(test_duplicate([1,2,3,4,5]))
print(test_duplicate([1,2,3,4, 4]))
print(test_duplicate([1,1,2,2,3,3,4,4,5]))

Sample Output:

False
True
True

Python Code Editor:

Contribute your code and comments through Disqus.

Previous: Write a Python program to convert an array to an ordinary list with the same items.
Next: Write a Python program to find the first duplicate element in a given array of integers. Return -1 If there are no such elements.