앱 개발을 위해서 꼭 알아야할 코틀린 문법 3가지

앱 개발을 위해서 꼭 알아야할 코틀린 문법 3가지

 

package com.MonoSoft.SayHello

 

import android.os.Bundle

import android.util.Log

import androidx.appcompat.app.AppCompatActivity

import kotlinx.android.synthetic.main.activity_main.*

class MainActivity : AppCompatActivity() {

val TAG = "MainActivity"

 

override fun onCreate(savedInstanceState: Bundle?) {

super.onCreate(savedInstanceState)

setContentView(R.layout.activity_main)

var myName = "고든호"

Log.d(TAG,"my name=$myName")

myName = "홍길동"

Log.d(TAG,"my name=$myName")

val PI = 3.141232 //상수

Log.d(TAG,"my name=$PI")

var myNumber = "1,2,3,4,5,6"

var thisWeekNumbers = "5,6,7,8,9,10"

if(myNumber == thisWeekNumbers){

Log.d(TAG,"당첨입니다")

textLog.text = "당첨되었습니다"

} else {

Log.d(TAG,"노우당첨")

textLog.text = "노우당첨"

}

 

for (idx in 1..10) {

textLog.append("\n현재 숫자는 = $idx 입니다")

//Log.d(TAG,"현재 숫자는 = $idx 입니다")

}

}

}

결과 화면