//불린 true , false
boolean condition1 = false;
System.out.println("조건1: " + condition1);
// 비교 결과가 참 or 거짓
boolean condition2 = 4 < 5;
System.out.println("조건2: " + condition2);
boolean condition3 = 2 > 8;
System.out.println("조건3: " + condition3);
// 비교 == 같다, != 같지않다, >=, <=
boolean condition4 = 9 == 10;
System.out.println("조건4: " + condition4);
System.out.printf("조건4: %b", condition4); // printf %b는 불린타입 지시어
