Why does "Doesn't exist" always print?

New to Julia
5

Hello,
Thank you so much for your reply.
I found another way:

flag = 0
    for i = low : high 
        if n == array[i]
           println("Exist.")
           flag = 0
           break
        else
            flag +=1
        end
    end
    if flag > 0
        println("Doesn't exist.")
    end