Complete excercise 8

08_calculator/calculator.js

@@ -1,25 +1,41 @@
 const add = function() {
-	
+  console.log(arguments)
+  let add = 0;
+  for (i = 0; i < arguments.length; i++) {
+      add += arguments[i]
+  }
+  return add
 };
 
 const subtract = function() {
-	
+  console.log(arguments)
+  return arguments[0] - arguments[1]
 };
 
 const sum = function() {
-	
+  console.log(arguments)
+	return arguments[0].reduce((total, arg) => total + arg,0)
 };
 
 const multiply = function() {
+  console.log(arguments)
+	return arguments[0].reduce((total, arg) => total * arg,1)
 
 };
 
 const power = function() {
+  console.log(arguments)
+  return arguments[0] ** arguments[1]
 	
 };
 
 const factorial = function() {
-	
+  console.log(arguments)
+  let factorial = 1;
+  for (i=1; i<= arguments[0]; i++) {
+    factorial *= i
+  }
+  return factorial;
 };
 
 // Do not edit below this line