import tkinter as tk

def salut():
    nume = entry.get()
    if nume:
        label_result.config(text=f"Salut, {nume}!")
    else:
        label_result.config(text="Introduceți un nume!")

root = tk.Tk()
root.title("Demo Tkinter")
root.geometry("350x200")

label = tk.Label(root, text="Introduceți numele:", font=("Arial", 14))
label.pack(pady=10)

entry = tk.Entry(root, width=25)
entry.pack()

btn = tk.Button(root, text="Salută", command=salut)
btn.pack(pady=10)

label_result = tk.Label(root, text="", font=("Arial", 14), fg="blue")
label_result.pack(pady=10)

root.mainloop()