# use $# # say if you are expecting exactly 2 parameters # -ne is bash's way of saying not equal if [[ "$#" -ne 2 ]]; then echo "this script needs exactly 2 parameters" exit 1 fi
Here is what the above code is Doing:
1. It’s checking if the number of parameters is not equal to 2.
2. If it is not equal to 2, it prints a message and exits.
3. If it is equal to 2, it continues on.