updated

Author: merttanm

BasicSyntax/.idea/vcs.xml

@@ -51,6 +51,16 @@ class MainActivity : AppCompatActivity() {
         val s2 = "${s1.replace("is" , "vas")}, but now is $a"
         println(s2)
 
+        println("----------------Conditional expressions--------------")
+
+        println("max number is ${maxOf(5,10)}")
+
+        println("----------------Nullable values--------------")
+        printProduct("6", "7")
+        printProduct("a", "7")
+        printProduct("a", "b")
+
+
 
     }
     fun printSum(a: Int, b: Int): Unit {
@@ -63,5 +73,29 @@ class MainActivity : AppCompatActivity() {
         vrbl +=1
     }
 
+    fun maxOf( number1 : Int, number2 : Int ) : Int{
+        if(number1>number2){
+            return number1
+        }else {
+            return number2
+        }
+    }
+
+    fun parseInt(str: String): Int? {
+        return str.toIntOrNull()
+    }
+    fun printProduct(arg1: String, arg2: String) {
+        val x = parseInt(arg1)
+        val y = parseInt(arg2)
+// Using `x * y` yields error because they may hold nulls.
+        if (x != null && y != null) {
+// x and y are automatically cast to non-nullable after null check
+            println(x * y)
+        }
+        else {
+            println("'$arg1' or '$arg2' is not a number")
+        }
+    }
+
 
 }

BasicSyntax/app/src/main/java/com/merttan/BasicSyntax/MainActivity.kt

@@ -0,0 +1,14 @@
+*.iml
+.gradle
+/local.properties
+/.idea/caches
+/.idea/libraries
+/.idea/modules.xml
+/.idea/workspace.xml
+/.idea/navEditor.xml
+/.idea/assetWizardSettings.xml
+.DS_Store
+/build
+/captures
+.externalNativeBuild
+.cxx

Loops/.gitignore

@@ -0,0 +1 @@
+/build

Loops/.idea/.name

@@ -0,0 +1,37 @@
+apply plugin: 'com.android.application'
+apply plugin: 'kotlin-android'
+apply plugin: 'kotlin-android-extensions'
+
+android {
+    compileSdkVersion 30
+    buildToolsVersion "30.0.2"
+
+    defaultConfig {
+        applicationId "com.merttan.loopslearning"
+        minSdkVersion 23
+        targetSdkVersion 30
+        versionCode 1
+        versionName "1.0"
+
+        testInstrumentationRunner "androidx.test.runner.AndroidJUnitRunner"
+    }
+
+    buildTypes {
+        release {
+            minifyEnabled false
+            proguardFiles getDefaultProguardFile('proguard-android-optimize.txt'), 'proguard-rules.pro'
+        }
+    }
+}
+
+dependencies {
+    implementation fileTree(dir: "libs", include: ["*.jar"])
+    implementation "org.jetbrains.kotlin:kotlin-stdlib:$kotlin_version"
+    implementation 'androidx.core:core-ktx:1.3.2'
+    implementation 'androidx.appcompat:appcompat:1.2.0'
+    implementation 'androidx.constraintlayout:constraintlayout:2.0.4'
+    testImplementation 'junit:junit:4.12'
+    androidTestImplementation 'androidx.test.ext:junit:1.1.2'
+    androidTestImplementation 'androidx.test.espresso:espresso-core:3.3.0'
+
+}

Loops/.idea/codeStyles/Project.xml

@@ -0,0 +1,21 @@
+# Add project specific ProGuard rules here.
+# You can control the set of applied configuration files using the
+# proguardFiles setting in build.gradle.
+#
+# For more details, see
+#   http://developer.android.com/guide/developing/tools/proguard.html
+
+# If your project uses WebView with JS, uncomment the following
+# and specify the fully qualified class name to the JavaScript interface
+# class:
+#-keepclassmembers class fqcn.of.javascript.interface.for.webview {
+#   public *;
+#}
+
+# Uncomment this to preserve the line number information for
+# debugging stack traces.
+#-keepattributes SourceFile,LineNumberTable
+
+# If you keep the line number information, uncomment this to
+# hide the original source file name.
+#-renamesourcefileattribute SourceFile

Loops/.idea/codeStyles/codeStyleConfig.xml

@@ -0,0 +1,24 @@
+package com.merttan.loopslearning
+
+import androidx.test.platform.app.InstrumentationRegistry
+import androidx.test.ext.junit.runners.AndroidJUnit4
+
+import org.junit.Test
+import org.junit.runner.RunWith
+
+import org.junit.Assert.*
+
+/**
+ * Instrumented test, which will execute on an Android device.
+ *
+ * See [testing documentation](http://d.android.com/tools/testing).
+ */
+@RunWith(AndroidJUnit4::class)
+class ExampleInstrumentedTest {
+    @Test
+    fun useAppContext() {
+        // Context of the app under test.
+        val appContext = InstrumentationRegistry.getInstrumentation().targetContext
+        assertEquals("com.merttan.loopslearning", appContext.packageName)
+    }
+}

Loops/.idea/gradle.xml

@@ -0,0 +1,21 @@
+<?xml version="1.0" encoding="utf-8"?>
+<manifest xmlns:android="http://schemas.android.com/apk/res/android"
+    package="com.merttan.loopslearning">
+
+    <application
+        android:allowBackup="true"
+        android:icon="@mipmap/ic_launcher"
+        android:label="@string/app_name"
+        android:roundIcon="@mipmap/ic_launcher_round"
+        android:supportsRtl="true"
+        android:theme="@style/AppTheme">
+        <activity android:name=".MainActivity">
+            <intent-filter>
+                <action android:name="android.intent.action.MAIN" />
+
+                <category android:name="android.intent.category.LAUNCHER" />
+            </intent-filter>
+        </activity>
+    </application>
+
+</manifest>