langs a-z

Task/Function-definition/UNIX-Shell/function-definition-1.sh

@@ -0,0 +1,10 @@
+multiply() {
+  # There is never anything between the parentheses after the function name
+  # Arguments are obtained using the positional parameters $1, and $2
+  # The return is given as a parameter to the return command
+  return `expr "$1" \* "$2"`    # The backslash is required to suppress interpolation
+}
+
+# Call the function
+multiply 3 4    # The function is invoked in statement context
+echo $?         # The dollarhook special variable gives the return value

Task/Function-definition/UNIX-Shell/function-definition-2.sh

@@ -0,0 +1,6 @@
+multiply() {
+  return $(($1 * $2))
+}
+
+multiply 5 6
+echo $?

Task/Function-definition/UNIX-Shell/function-definition-3.sh

@@ -0,0 +1,5 @@
+multiply() {
+  echo -n $(($1 * $2))
+}
+
+echo $(multiply 5 6)