How to comment in HTML, JS, PHP, MySQL?

# 1. HTML Note

# & LT;!-HTML Note-& GT;

2.CSSComments

            /*CSS Comments*/

  3.Javascript Comment

• ##Single-line comment: //Single-line comment

• Multi-line comment: /*Multi-line comment*/

4.MySQLComments

##Single-line comments: --Single-line comments
Multi-line comments: /*Multi-line comments*/

5.

PHPComments

Single-line comments: //Single-line comments
Multi-line comments: /*Multi-line comments*/

• 
  

## 6.

Smarty

Comments

           

Single-line comment: {* This is a comment*}

##                                                                                                                                                                        
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