Python program to print the duplicate elements of an array

#Initialize array     
arr = [1, 2, 3, 4, 2, 7, 8, 8, 3];     
     
print("Duplicate elements in given array: ");    
#Searches for duplicate element    
for i in range(0, len(arr)):    
    for j in range(i+1, len(arr)):    
        if(arr[i] == arr[j]):    
            print(arr[j]);    

Output:

Duplicate elements in given array:
2
3
8