ForNext

018. comment out multiple lines

VBScript

JScript

Perl

=for
comment line
another line
=cut

PHP

/* comment line
another line */

Python

use triple quote string literal:
'''comment line
another line'''

Ruby

=begin
comment line
another line
=end

PowerShell

Scala

F#

C

C++

C++Builder

VC++

C#

Java

Objective-C

D

VB

VB.NET

Delphi

Ada

PL/SQL

T-SQL