Skip to main content

Declarations

A declaration is a formal or explicit announcement of an identifier's meaning.

Some declarations are let, const, function and class.

let​

let is a declaration for a block-scoped local variable.

  • Within the declaration you can optionally initialize it to a value

An example is:

let a; or,

let b = 6;

warning

It's important to mention immediately: do not use var. Use let every time!

var can leak into other code. It's dangerous and bad practice.

Here is a simple, easy example using let:

info

A type is not required in a declaration in Hedgehog Script. It is a dynamic language.

  • The declaration is block-scoped and local.

    • In the example above, the declaration let x = 2; dissolves after the if conditional.

  • If used in a loop, the variable declared by let would dissolve after the loop.

Let's show an example of this concept:

info

If one is interested in why var is objected to, consider this article explaining some reasons: Why Var is Obsolete

const​

A declaration using const is quite similar to let.

The difference is that const variables can't be redeclared or reassigned.

const also has a block scope.

Here is an example displaying the difference:

function​

Using the identifier function lets one declare a function.

Unlike a variable, one must initialize a function's parameters and code statements in Hedgehog Script:

info

In the example above, the parameters are numbers then strings!

That's because Hedgehog Script is dynamically typed.

class​

Just like a function declaration, one uses class declarations in a similar way.

Some additional things classes can do (functions can too in some cases, but it's messy) are:

  • Classes can be redeclared

  • Class names are optional

Here is an example displaying the variety of class declarations:

tip

You may see this before the functions or classes section.

Visit Hedgehog Script Functions and Hedgehog Script Classes for information about them.