A simple code exercise to learn Julia. Inspired by Andrew Vazsonyi's article Which door has the Cadillac? (and the helpful wikipedia entry: https://en.wikipedia.org/wiki/Monty_Hall_problem).
Reference: Vazsonyi, Andrew. "Which door has the Cadillac." Decision Line 30.1 (1999): 17-19. https://sites.oxy.edu/lengyel/M372/Vazsonyi2003/vazs30_1.pdf