Chapter 2.3: Input & Output

Output

Remember our "Hello, World!" program? That is the output resulting from our program, and is a very important concept of programming. In fact, the whole purpose of a program is to create some output, whether it's writing a file or displaying a 3D game.

GLang allows you to display your program's output right inside of the terminal, with the bark function. Functions will be touched on in later chapters, but for now, remember them as little blocks of code we can execute by calling them.

bark(1 + 1);

Here, we call the bark function to display the result of 1 + 1, in the terminal, you'll see 2. bark can take any piece of code and display it in the terminal, like a variable named y with the contents of a string.

obj y = "This is some string.";

bark(y);

In the terminal, you'll see the text This is some string. because GLang is displaying the value of y.

Input

Input is another very important concept every programmer should know. It's how you enter your email into a login form, it's how your computer determines if you are typing, input is everywhere.

GLang allows you to get input from the terminal with the chew function. chew will take a prompt, e.g. "Enter your name: ", and give you what the user entered as a string.

obj x = chew("Enter your name: ");

bark(x);

Here, we call the chew function prompting the terminal with Enter your name: , and until something is entered, the program freezes. When x is outputted, it will show whatever you typed in the terminal.