From 3e61aeaec4e66bec04680a244ecfbb581f4c2cb6 Mon Sep 17 00:00:00 2001 From: Ki Rill Date: Sun, 15 Dec 2019 16:33:13 +0600 Subject: [PATCH] Update main.d --- lesson#2/main.d | 21 +++++++++++++++++---- 1 file changed, 17 insertions(+), 4 deletions(-) diff --git a/lesson#2/main.d b/lesson#2/main.d index dd6e217..deedca0 100644 --- a/lesson#2/main.d +++ b/lesson#2/main.d @@ -1,5 +1,18 @@ -import std.stdio; // input & output +// This is a comment, it is ignored by the compiler +// It is useful to comment some pieces of your code. +// For example, instead of reading somebody's code, you could read a comment, which explains what that code does -void main() { - writeln("Hello, Dlang!"); -} \ No newline at end of file +// Before we start coding something interesting, we need to include a library for basic functionality. +// A library is a collection of reusable code written by somebody else. +// This way we do not need to write the same code every time. It is written and stored in a library for us to use. +// A library provides some basic functionality such as getting input from user, outputting text to screen, +// reading from files etc. + +// To include and use a library use keyword 'import [library name]' +import std.stdio; // handles data input and output + +// Our main function. Whenver you launch your program, it starts executing instructions from the main function. +// A function is a group of statements that performs a certain task. +void main() { + writeln("Hello, Dlang!"); // outputs text to terminal/console +}