MainActivity.kt
package com.cfsuman.kotlinexamples
import android.support.v7.app.AppCompatActivity
import android.os.Bundle
import android.widget.Button
import android.widget.TextView
class MainActivity : AppCompatActivity() {
override fun onCreate(savedInstanceState: Bundle?) {
super.onCreate(savedInstanceState)
setContentView(R.layout.activity_main)
// Get the widgets
val textView = findViewById<TextView>(R.id.text_view)
val button = findViewById<Button>(R.id.button);
val button2 = findViewById<Button>(R.id.button2);
val button3 = findViewById<Button>(R.id.button3);
// For loop example
button.setOnClickListener{
textView.text = "For loop 1 to 5 \n"
// Loop through the range
for (i in 1..5){
textView.text = textView.text.toString() +" " + i + "\n"
}
}
// For loop break statement example
button2.setOnClickListener{
textView.text = "For loop 1 to 10 and break after 6 \n"
for(i in 1..10){
textView.text = textView.text.toString() + " " + i + "\n"
// break the loop if i equal 6
if(i==6)
break
}
}
// For loop continue statement example
button3.setOnClickListener{
textView.text = "For loop 1 to 10 continue if number is 5 \n"
for (i in 1..10){
if(i==5)
continue
textView.text = textView.text.toString() + " " + i + "\n"
}
}
}
}
activity_main.xml
<?xml version="1.0" encoding="utf-8"?>
<LinearLayout
xmlns:android="http://schemas.android.com/apk/res/android"
xmlns:tools="http://schemas.android.com/tools"
android:id="@+id/root_layout"
android:layout_width="match_parent"
android:layout_height="match_parent"
android:orientation="vertical"
android:padding="16dp"
>
<Button
android:id="@+id/button"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:text="For loop"
/>
<Button
android:id="@+id/button2"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:text="For loop break"
/>
<Button
android:id="@+id/button3"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:text="For loop continue"
/>
<TextView
android:id="@+id/text_view"
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:text=""
android:textSize="18sp"
android:textStyle="bold"
android:textColor="#ff191d"
android:layout_marginTop="20dp"
/>
</LinearLayout>



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