Add existing scripts

sum.sh

@@ -0,0 +1,19 @@
+# Original sum function, only allows for two values
+orig_sum() {
+    local value1=$1
+    local value2=$2
+    local result=$(( value1 + value2 ))
+    echo "The sum of ${value1} and ${value2} is ${result}"
+}
+
+# Improved sum function that allows as many as required
+sum() {
+    local total=0
+    for value in $@; do
+        total=$(( total + value ))
+    done
+
+    # Write the result
+    echo "Summed $# values for a total of: ${total}"
+}
+