JS: Syntax | JavaScript
JavaScript Syntax
var s = "syntax";//one line comments
JavaScript syntax is very close to C, Java, and C# etc.
JavaScript Variable declaration
var x = 0;
In the example above var is the keyword to declare a variable, x is the identifier, = is the assignement operator and 0 is the value being assigned to x
JavaScript statement
JavaScript statments may be seperated with semicolon ; the end:
var str = 'PiTribe'; console.log('str:', str);
str: PiTribe
or each statment per line:
var str = 'PiTribe'
console.log('str:', str)
str: PiTribe
This is recommended to use a semicolon ; to for a clean and readable code and avoid any confusion.
JavaScript comments
JavaScript comments used for the programmer's memory when reviewing or modifing the code. There are two types of comments:
- Singlie-line comments, after
// - Multi-line comments within
/*and*/
//This is single-line comment, anything in rest of the line will not be executed by the JavaScript interpreter
/*
This is multi-line comment,
anything within slash-asteric and asteric-slash,
will not be executed by the
JavaScript interpreter
*/
Prefer single-line comment over multi-line comment
Singlie-line comment // and multi-line comment /**/ have different reasons to use. In case have to comment a piece of code for some reason, prefer single-line comments because if you have already multi-line comments /**/ closed this will override the effect.
- JavaScript statments can be ended with
;or new line; - Coments can be single-line
//or multi-line/**/