bash: add employees.bash (another UAS thing)

I am doing an open course and this looks like something I might want to look back later

bash/.gitignore

@@ -4,6 +4,8 @@
 *.jpeg
 # download-forgejo.bash results to these
 forgejo-*
+# employees.bash
+employees.csv
 # submodule symlinks
 backup-ops2l-vmc.bash
 generate-vcard-qr.bash

bash/calculator.bash

@@ -0,0 +1,47 @@
+#!/usr/bin/env bash
+
+# Ensure we are given three parameters
+if [ $# -ne 3 ]; then
+	echo "Please run this script like: ./$0 <operand1> <operator> <operand2>"
+	echo "where operator is either +, -, * or /. You may need to escape or"
+	echo "single quote it."
+	exit 1
+fi
+
+# Store the operands and operator
+operand1=$1
+operator=$2
+operand2=$3
+
+# The main case/switch which was required in the exercise
+case $operator in
+'+')
+	result=$((operand1 + operand2))
+	operatorWord="plus"
+	;;
+'-')
+	result=$((operand1 - operand2))
+	operatorWord="minus"
+	;;
+'*')
+	result=$((operand1 * operand2))
+	operatorWord="multiplied by"
+	;;
+'/')
+	if [ "$operand2" -eq 0 ]; then
+		echo "The laws of mathematics don't allow division by zero."
+		exit 1
+	else
+		result=$((operand1 / operand2))
+		operatorWord="divided by"
+	fi
+	;;
+# Let's not forget default case either
+*)
+	echo "Please use operator +, -. * or /"
+	exit 1
+	;;
+esac
+
+# and finally the output in format wanted by the task
+echo "$operand1 $operatorWord $operand2 equals $result"

bash/employees.bash

@@ -0,0 +1,34 @@
+#!/usr/bin/env bash
+
+# Ensure that the file is empty. -n is specified to avoid \n which would
+# become obvious in the cat in the end.
+echo -n '' >employees.csv
+
+# Begin at 0 so the incrementing later makes the first employee id 1.
+employees=0
+
+# While the employee name isn't 0, take names.
+# neovim again complains about backslash dangling and I will probably never
+# type read without -r
+while true; do
+	echo "Enter employee name or 0 to stop: "
+	read -r name
+
+	# stops and breaks out of the loop
+	if [ "$name" = "0" ]; then
+		break
+	fi
+
+	# begin at employee id 1 by incrementing employees from 0
+	employee_id=$((employees + 1))
+
+	# store employee_id and name to employees.csv
+	# I think tsv would be easier and better, but this is what the task requested.
+	echo "$employee_id;$name" >>employees.csv
+
+	# increment employees so the next id will be 2
+	employees=$((employees + 1))
+done
+
+# and finally print our document. I stand with tsv being better option.
+cat employees.csv