java 함수호출2 return

package textMethod;

public class MethodReturns {

	public static void main(String[] args) {
		int result;
		result = adder(4, 5);
		
		System.out.println("4 + 5 = "+result);
		System.out.println("3.5 * 3.5 = "+square(3.5));
	}
	
	public static int adder(int num1, int num2) {
		int addResult = num1 + num2;
		return addResult;
	}
	
	public static double square(double num) {
		return num * num;
	}

}

//출력결과

4 + 5 = 9
3.5 * 3.5 = 12.25

4 + 5 = 9
3.5 * 3.5 = 12.25

 

 

-----------------------------

 

 

package testMethod;

public class OnlyReturn {

	public static void main(String[] args) {
		divide(4, 2);
		divide(6, 2);
		divide(9, 0);
	}
	public static void divide(int num1, int num2) {
		if(num2 == 0) {
			System.out.println("0으로는 나눌 수 없다.");
			return;
		}
		System.out.println("나눗셈 결과 : " + (num1/num2));
	}

}

//출력결과

 

나눗셈 결과 : 2
나눗셈 결과 : 3
0으로는 나눌 수 없다.