STDERR? What is it? What are its common goals?

Question

I wonder how the STDERR handle works? Let's keep it down to say batch files so it is simple and focused? I know that many programming languages ​​accept STDERR, so I don’t know if they can be used in different ways, or maybe there is a common function for all programming languages?

If someone can provide some common use examples that you saw, or an explanation of why someone could use it for ??? a situation that would be amazing.

Thanks in advance!

Answer 1

Normally you should use stderr for error messages.

, stdout / stderr

:

myprogram.exe > stdout.txt

, myprogram.exe, stdout stdout.txt. , stderr, stdout.txt. , .

Answer 2

STDERR . , , . , , , , STDOUT. , ( ).