ForNext

173. standard file handles

VBScript

JScript

Perl

STDIN STDOUT STDERR

PHP

only set by CLI; not set when reading script from standard input:
STDIN STDOUT STDERR

Python

sys.stdin sys.stdout sys.stderr

Ruby

$stdin $stdout $stderr

PowerShell

Scala

F#

C

C++

C++Builder

VC++

C#

Java

Objective-C

D

VB

VB.NET

Delphi

Ada

PL/SQL

T-SQL