Just for you, and this time in the Pythonesque rendering. module main: import std (range) import std.io (printf, IO) # print the Fahrenheit-Celcius table for fahr = 0, 20, ..., 300 function main(mutable IO io): Int lower = 0 # lower bound Int upper = 300 # upper bound Int step = 20 # step for Int fahr in range(lower, upper, step): Double celcius = 5 * (fahr - 32) / 9 std.io.printf(io, "%3d\t%6.1f\n", fahr, celcius) It does not really look like it, but this language is purely functional. It represents side effects using unique types. If you declare a mutable parameter, you basically declare a unique input parameter and a unique output parameter. ... Read more 》

Just for you: module main { import std (range); import std.io (printf, IO); /* print the Fahrenheit-Celcius table for fahr = 0, 20, ..., 300 */ function main(mutable IO io) { Int lower = 0; // lower bound Int upper = 300; // upper bound Int step = 20; // step for (Int fahr in range(lower, upper, step)) { Double celcius = 5 * (fahr - 32) / 9; std.io.printf(io, "%3d\t%6.1f\n", fahr, celcius); } } } It does not really look like it, but this language is purely functional. It represents side effects using unique types. If you declare a mutable parameter, you basically declare a unique input parameter and a unique output parameter. ... Read more 》