编辑代码

#JSRUN引擎2.0，支持多达30种语言在线运行，全仿真在线交互输入输出。
echo "Hello world  -  sh.jsrun.net"
pwd
ls
RUNOOB="www.runoob.com"
echo $RUNOOB
_var="123"
var2="abc"
echo $var2
echo $_var
for skill in Ada Coffe Action Java; do
    echo "I am good at ${skill}Script"
done

unset _var
echo $_var

my_string="Hello, World!"
echo $my_string
my_array=(1,2,3,4,5)
echo $my_array
echo $PATH
your_name="runoob"
str="Hello, I know you are \"$your_name\"! \n"
echo -e $str
your_name="runoob"
# 使用双引号拼接
greeting="hello, "$your_name" !"
greeting_1="hello, ${your_name} !"
echo $greeting  $greeting_1

# 使用单引号拼接
greeting_2='hello, '$your_name' !'
greeting_3='hello, ${your_name} !'
echo $greeting_2  $greeting_3
string="abcd"
echo ${#string}   # 输出 4
string="runoob is a great site"

echo ${string:1:4} # 输出 unoo

array_name=(value0 value1 value2 value3)
valuen=${array_name[n]}

echo $valuen
echo ${array_name[@]}

# 取得数组元素的个数
length=${#array_name[@]}
# 或者
length=${#array_name[*]}
echo $length
# 取得数组单个元素的长度
length=${#array_name[n]}

echo $length

var3="111"
echo $var3