How to reflect the text in entry widget to label by using variable

entry_2.py

import ctypes
import tkinter


if __name__ == "__main__":
    ctypes.windll.shcore.SetProcessDpiAwareness(1)
    root = tkinter.Tk()

    #variable
    var = tkinter.StringVar(root)

    #Label
    l = tkinter.Label(root, width=15, bg="lightblue", textvariable=var)
    l.pack(pady=3)

    #Entry
    e1 = tkinter.Entry(root, bd=5, textvariable=var)
    e1.pack(padx=3)

    root.mainloop()