I always find it instructive to start from the commandline. When I subsequently migrate to IDE, my feet are on the ground.I've been trying with a basic "hello world" style Swift snippet: the challenge is to draw a window on the screen without using Xcode.Now Swift has a compiler and an interpreter. So the challenge bifurcates -- to get it running on each.Could someone provide a set of instructions for each, together with an explanation of what's going on?π