简单的shell

#!/bin/sh
echo "this is for test function in shell";


a="hello world"
num=2
num2=2
echo "a is "
echo $a
echo "num is ${num}nd"
if [ -f "/etc/first" ]; then
    echo "there is etc"
elif [ -f "./first" ];then
    echo "here has"
elif [ "$num" = "$a" ];then
    echo "num = a"
else [ "${num}"="${num2}" ]
    echo "num = num2"
fi



test()
{
    echo "1 is $1 2 is $2";
    echo "this is in function test";
    return $2;
}

result=$(test 2 222);

echo "end test is $result"