wk.2.2.4

Define a procedure pointDist(x1, y1, x2, y2) that returns the distance between a point in two-dimensional space with coordinates x1, y1 and another point with coordinates x2, y2. Use math.sqrt (of type num -> float). Your function should have type (num, num, num, num) -> float.

import math
def pointDist(x1, y1, x2, y2):
    return math.sqrt((y2 - y1) * (y2 - y1) + (x2 - x1) * (x2 - x1))