You can also use array; the simplest method of creating an array variable is to assign a value to one of its indices:

TEST[0]=zero

TEST[1]=one

TEST[2]=two

or, with:

TEST=(zero one two)

now, you access it as follows:

${TEST[index]}

ie

echo "First Index: ${TEST[0]}"

or you can access all the items in an array in one of the following ways:

${TEST[*]}

${TEST[@]}

For more help, read this usefull guide