package PACK01;
public class Hello01 {
public static void main(String[] args) {
//출력 연습
System.out.println("todal"); //todal
System.out.println("호랑이"); //호랑이
System.out.println("★"); //★
System.out.println(123); //123
System.out.println(100+200); //300
System.out.println("앵무새"+"소나무"); //앵무새소나무
System.out.println("100"+"200"); //100200
System.out.println(100+"200"); //100200
System.out.println(100+200+300); // 600
System.out.println(100+200+"300"); //300300
System.out.println("100"+200+300); //100200300
}
}
package Pack;
public class Hello01 {
public static void main(String[] args) {
int x = 3, y = 4;
System.out.println(x); //3
System.out.println(y); //4
System.out.println(x+y); //7
System.out.println(x+" "+y);// 가운데 띄워주기 //3 4
System.out.println(x+""+y); //한 줄 입력 //34
System.out.println("호\n랑\n이"); //줄 바꿈
System.out.println("호\t랑\t이"); // 수평 탭 //호 랑 이
{
//a 변수는 {} 안에서만 유효하다.
int a = 10;
System.out.println(a); //10
}
/* System.out.println(a);
* {} 밖에선 유효하지 않다.
Exception in thread "main" java.lang.Error: Unresolved compilation problem:
a cannot be resolved to a variable */
}
}