#! /bin/bash
echo use function
hello()
{
echo how many parameters in the function:$#;
echo the name of this function is $0;
echo the first parameters is :$1;
echo the second parameters is :$2;

}
hello "hello" "world"

[root@lenny Desktop]# ./hello.sh 
use function
how many parameters in the function:2
the name of this function is ./hello.sh
the first parameters is :hello
the second parameters is :world