Challenge submission

caseClass.js

@@ -0,0 +1,24 @@
+class Person {
+
+    constructor(name,age) {
+        this.name = name;
+        this.age = age;
+    }
+
+    get age() {
+        return this._age;
+    }
+
+    set age(value) {
+        if (value < 0) {
+          console.log('Hello ' + this.name + ' The age cannot be a negative value');
+          return;
+        }
+        this._age = value;
+    }
+
+  }
+  let user = new Person('John',22);
+  console.log(user.age); //returns 22
+
+  user = new Person('John',-15); // logs an error message

factorial.js

@@ -0,0 +1,38 @@
+function FirstFactorial(num) { 
+
+    let factorial = 1;
+
+    for (let i = 1; i <= num; i++) {  
+      factorial = factorial * i;
+    }
+
+    console.log(factorial);
+
+  }
+
+  //Get process.stdin as the standard input object.
+    let standard_input = process.stdin;
+
+    // Set input character encoding.
+    standard_input.setEncoding('utf-8');
+
+    // Prompt user to input data in console.
+    console.log("Please input an integer: ");
+
+    // When user inputs data and click enter key.
+    standard_input.on('data', function (data) {
+
+        // User input exit.
+        if(data === 'exit\n'){
+            // Program exit.
+            console.log("User input complete, program exit.");
+            process.exit();
+        }else
+        {
+            //return a List of all the factorials of the numbers between 0 and user input
+            let number = parseInt(data);
+            for (let counter = 0; counter <= number; counter++) {
+                FirstFactorial(counter);
+            }
+        }
+    });