added

application/KotlinConcepts/app/src/main/java/com/istudio/app/main/MainActivity.kt

@@ -69,7 +69,7 @@ class MainActivity : ComponentActivity() {
 
                     NavHost(
                         navController = navController,
-                        startDestination = ModuleDemo.FlattenFlowsDemo.rout
+                        startDestination = ModuleDemo.DemoSelection.rout
                     ) {
                         // Selection Screen
                         composable(ModuleDemo.DemoSelection.rout) {

application/KotlinConcepts/app/src/main/java/com/istudio/app/modules/module_demos/basic_fundamentals/ui/KotlinBasicsDemo.kt

@@ -14,6 +14,7 @@ import androidx.compose.ui.unit.dp
 import androidx.hilt.navigation.compose.hiltViewModel
 import androidx.navigation.NavHostController
 import com.istudio.app.ui.composables.AppButton
+import com.istudio.app.ui.composables.AppText
 
 @Composable
 fun KotlinBasicsDemo(navController: NavHostController) {
@@ -103,6 +104,22 @@ fun KotlinBasicsDemo(navController: NavHostController) {
             viewModel.membersPrivateDemo()
         })
 
+        Spacer(modifier = Modifier.height(16.dp))
+
+        AppButton(text = "Init block significance", onClick = {
+            viewModel.initBlockSignificanceDemo()
+        })
+
+        Spacer(modifier = Modifier.height(16.dp))
+
+        AppText(text = "Constructors Demo")
+
+        Spacer(modifier = Modifier.height(5.dp))
+
+        AppButton(text = "Primary Constructor", onClick = {
+            viewModel.primaryConstructorDemo()
+        })
+
     }
 
 }

application/KotlinConcepts/app/src/main/java/com/istudio/app/modules/module_demos/basic_fundamentals/ui/KotlinBasicsDemoVm.kt

@@ -237,4 +237,46 @@ class KotlinBasicsDemoVm  @Inject constructor( ) : ViewModel() {
     class Person(name: String)
     class Student(val name: String)
 
+
+    /**
+     * Init block significance
+     */
+    fun initBlockSignificanceDemo() {
+        println("Before City Class construction")
+        val demo = City("New York")
+        println("After City Class construction")
+        demo.demo()
+    }
+
+    class City(val name: String){
+        init {
+            println("City is created with Name:-> $name")
+        }
+
+        fun demo(){
+            println("City construction is in progress")
+        }
+    }
+
+
+    /**
+     * Primary constructor demo
+     */
+    fun primaryConstructorDemo() {
+        val science = Science()
+        val history = History()
+        // val maths = Maths() // Cannot access '<init>': it is private in 'Maths'
+    }
+
+    // Class with default constructor(way 1)
+    class Science()
+    // Class with default constructor(way 2)
+    class History constructor()
+    // Class with private constructor
+    class Maths private constructor()
+    // Class with protected constructor constructor
+    class Computers protected constructor()
+
+
+
 }