Write a shell script that accepts a string from the terminal and echo suitable message if it doesn’t have at least ten characters

Code for Write a shell script that accepts a string from the terminal and echo suitable message if it doesn’t have at least ten characters in Unix / Linux / Ubuntu

echo "Enter string"
read str

length=`echo $str | wc -c`
length=`echo $length - 1 |bc`
if [ $length -lt 10 ]
then
        echo "You enter less than 10 character"
fi