[자바 Utils&LIb] 51. JRE 라이브러리 (Math)

1. 절대값 (abs)

 System.out.println(Math.abs(-1));

2. 최소, 최대(min, max)

System.out.println(Math.max(5, 10));
System.out.println(Math.min(5, 10));

3. 거듭제곱 (pow)

 System.out.println(Math.pow(2, 16));

4. 반올림(round) 올림(ceil) 내림(floor)

System.out.println(Math.floor(10.3));

5. 제곱근(sqrt)

 System.out.println(Math.sqrt(7));

6. 랜덤(random)

int n1 = (int) (Math.random() * 45) + 1;
System.out.println(n1);

7. 로그(log)

System.out.println(Math.log(15));