&2 as function parameter

[chella]

Hi Experts,

In a UNIX shell script a function is called with the parameter &2.

f_check &2

Please help me to understand what does the above call do.
what does &2 mean there?

Thanks in Advance,
Chella

[ashitpro]

&1 represent the file descriptor for standard output
&2 represent the file descriptor for standard error


e.g.

ls 2>&1 > temp.txt

here standard error is duplicated as standard output (2>&1)
So everything will be redirected to temp.txt

for more information see
man bash
look for redirection
or search for &1

Correct me if I am wrong