import math


def euclidean_distance(current_x, current_y, goal_x, goal_y):
    """
    Euclidean distance
    current_node(current_x, current_y)
    goal_node(goal_x, goal_y)
    """
    distance = math.sqrt((goal_x - current_x)**2 + (goal_y - current_y)**2)
    return distance