변수와 예제

정수형은 소수점 없음.

실수형은 소수점 표시.

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정수형 : byte(1byte), short(2byte), int(4byte, 정수의 기본 데이터형), long(8byte)

ex)

byte kor = 80;

System.out.println("kor="+kor);

kor = (byte)(kor + 60);

System.out.println("kor="+kor);

int eng = 90;

eng = eng + 90;

System.out.println("eng="+eng);

long num = 98765432100L;

int numInt = 987654321;

System.out.println("num="+num+", numInt="+numInt);

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실수형 : float(4byte), double(8byte, 실수의 기본 데이터형)

ex)

double numDouble = 12.9;

System.out.println("numDouble="+numDouble);

float numFloat = (float)12.9;

System.out.println("numFloat="+numFloat);

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논리형 : boolean(1byte)

ex)

boolean data1 = true;

System.out.println("data1="+data1);

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문자형 : char(2byte)

ex)

char name = 'A';

name++;

System.out.println("name="+name);

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