import tkinter as tk
root = tk.Tk()
root.title("Simple GUI")
root.geometry("300x200")
tk.Label(root, text="Enter Name:").pack()
name_entry = tk.Entry(root)
name_entry.pack()
def show_name():
    tk.Label(root, text=f"Hello, {name_entry.get()}!").pack()
tk.Button(root, text="Submit", command=show_name).pack()
root.mainloop()