Finding Duplicates in Array and printing them only Once

Question

I am trying to loop through my array and find all the numbers that are repeating more than once:

E.G: if there is 1 1 2 3 4

It should print saying \

Answer 1

You perform the check for every single item of the array, including the first 4, the second 4 and so on. That's why it just doesn't stop and it prints the message multiple times per duplicated element.

You're saying you cannot use a Set and that you don't want to sort your data. My suggestion is that you loop over the array and add each duplicated item to a list. Make sure you check whether the item has already been added. (or use a Set :) )

Then loop over the list and print those items.