Use Command Line Arguments(Perameters) in a Bash Script.sh

while getopts u:a:f: flag
do
    case "${flag}" in
        u) username=${OPTARG};;
        a) age=${OPTARG};;
        f) fullname=${OPTARG};;
    esac
done
echo "Username: $username";
echo "Age: $age";
echo "Full Name: $fullname";



# bash script.sh -u Amir -a 31 -f AmirSaleem