#!/bin/bash
s=0
function sum()
{
    local brr=($*)
    for i in ${brr[*]}
    do
        ((s+=i))
    done
    echo $s
}
arr=(1 2 3 4 5 6 7 8 9 )
sum ${arr[*]}

#!/bin/bash
function getid()
{
    gid=`id -g`
    uid=`id -u`
    echo "gid是：$gid 组id是：$uid"
}
id=`getid`
echo $id