how to write repeatedly numbers for 900 to 1000 with pyautogui

import pyautogui as pag
import time

D = 900

for D in range(100):
    pag.write(D)
    pag.press("Enter")
    D += 1

i want it to type untill its get to 1000

>Solution :

import pyautogui as pag

D = 900

while D < 1001
    pag.typewrite(f"{D}")
    pag.press('Enter')
    D += 1

Int has to be string!