Readme.md

Syntax

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Syntax

C-like syntax

JavaScript syntax borrows heavily from C
and other C-like languages such as Java and Perl.

Case-sensitivity

In JavaScript, everything is case-sensitive
variables, function names, and operators are case-sensitive

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Syntax

Identifiers

An identifier is the name of a variable, function, property, or argument

• may be one or more characters
• starts with a letter or _ or $
• can contains letters, numbers, _, $

var Name;     // OK
var name;     // OK
var _;        // OK
var _name1;   // OK
var $;        // OK
var $name2;   // OK
var π;        // OK
var Åmstrong; // OK
var 1name;    // SyntaxError: Unexpected token ILLEGAL

Note

Letters can be in extended ASCII or Unicode

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Syntax

Comments

single-line comment

//single line comment

block comment

/*
 * This is a multi-line
 * Comment
 */

Convention

For readability each line of block comment starts with *

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Syntax

Statements

Statements are terminated by a semicolon ;

var diff = a - b; //OK
var sum = a + b   //OK but don't forget semicolon!

Statements can be combined into a code block between curly braces { and }

{
  test = false;
  alert("hello!");
}

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Syntax

Keywords

break        case         catch        continue     do          
debugger     default      delete       else         finally     
for          function     instanceof   if           in          
new          return       switch       this         throws      
try          typeof       var          void         while       
with

Reserved words

abstract     boolean      byte         char         class       
const        debugger     double       enum         export      
extends      final        float        goto         implements  
import       int          interface    long         native      
package      private      protected    public       short       
static       super        synchronized throws       transient   
volatile