feat:add functionality

ex-1.js

@@ -2,3 +2,8 @@
 let lightBulbStatus = "On";
 
 // Start coding here.
+if (lightBulbStatus === "On") {
+    console.log(`Light bulb is ${lightBulbStatus}`); 
+} else {
+    console.log("Light bulb is OFF");
+}

ex-2.js

@@ -2,3 +2,10 @@
 let lightBulbStatus = "On";
 
 // Start coding here.
+if (lightBulbStatus === "On"){
+    console.log(`Light Bulb is ${lightBulbStatus}`);
+} else if ( lightBulbStatus === "Off"){
+    console.log(`Light Blub is ${lightBulbStatus}`);
+} else if( lightBulbStatus === "Broken"){
+    console.log(`Light bulb is ${lightBulbStatus}`);
+}

ex-3.js

@@ -2,4 +2,12 @@
 // Ternary Operator
 let lightBulbStatus = "Off";
 
-//Start coding here
+//Start coding here
+const message =
+    lightBulbStatus ==="On"
+    ? "Light bulb is On."
+    : lightBulbStatus === "OFF"
+    ? "Light bulb is Off."
+    : "Please choose the correct input (On/Off)"
+
+console.log(message);

ex-4.js

@@ -2,4 +2,14 @@
 // Switch Statement
 let lightBulbStatus = "On";
 
-//Start coding here
+//Start coding here
+switch (lightBulbStatus) {
+    case "On":
+    case "Off":
+    case "Broken":
+        console.log(`Light bulb is ${lightBulbStatus}`);
+        break;
+    default:
+        console.log(`มองดูหลอดไฟของคุณพี่ก่อนจ้า`);
+        break;
+}

ex-5.js

@@ -1,6 +1,28 @@
 function calculateStudentGrade(score) {
   // Start coding here
 }
+if (score > 100 || score < 0) {
+  return "F";
+}
+
+  if ( score >= 90){
+    return "A";
+  }
+
+  if (score >= 80){
+    return "B";
+  }
+
+  if (score >= 70){
+    return "C";
+  }
+
+  if (score >= 60){
+    return "D";
+  }
+
+  return " Check your Score";
+}
 
 // Example case
 let johnGrade = calculateStudentGrade(30);

ex-6.js

@@ -3,6 +3,9 @@ let favoriteBooks = [];
 function addFavoriteBook(bookName) {
   // Start coding here !
 }
+if (bookName.includes("Beauty")){
+  favoriteBooks.push(bookName);
+}
 
 // Example case
 addFavoriteBook("Let Me Tell You What I Mean");