Create ex2

Chapter 11/ex2

@@ -0,0 +1,10 @@
+        let val = "I love JavaScript";
+        val.toLowerCase();
+        let vowels = ["a","e","i","o","u"];
+        const output = document.querySelector("output");
+        vowels.forEach((letter,index) =>{
+            let temp = letter.toLowerCase();
+            console.log(temp);
+            val = val.replace(temp,index)
+        })
+        console.log(val);