Variables

Melon is a dynamically typed language. This means that the programmer doesn't have to specify the type of a variable in advance, instead a variable can hold any type of value at any given moment of the program's execution.

Local

Local variables are declared using the let keyword followed by the variable name.

Variable names can have any combination of number, letters and the character _ but they cannot start with a number.

let myVariable = "Hello";

Variables declared with let are block-scoped:

let myVariable = "Hello";

if (something) {

let myVariable = "I'm alive only inside this block!";

}

Global

Any variable that is read or written to without having been declared is considered to be a global variable:

myGlobalVar = "I'm inside a global variable";

Global variables are shared by the entire VM instance and can be accessed from anywhere.

The language uses global variables to expose core modules to the programmer, such as the io or fs module.