In the turtle module, how to find the maximum values of coordinates?

import turtle as t
from random import randint, random
def draw_star(points, size, col, x, y):
    t.penup()
    t.goto(x, y)
    t.pendown()
    angle = 180 - (180 / points)
    t.color(col)
    t.begin_fill()
    for i in range(points):
        t.forward(size)
        t.right(angle)
    t.end_fill()
# Main code
while True:
    ranPts = randint(2, 5) * 2 + 1
    ranSize = randint(10, 50)
    ranCol = (random(), random(), random())
    ranX = randint(-350, 300)
    ranY = randint(-250, 250)
    draw_star(ranPts, ranSize, ranCol, ranX, ranY)

Question: How could I know the maximum values of coordinates of my screen? So I can have a better idea on how to set the values of ranX and ranY?

Thanks.

Answer

I found out this is what I need: t.window_width() and t.window_height().