import java.util.Scanner; public class array {public static void main(String args[]){int sum = 0;int[] a;a = new int[5];int[][] b;b = new int[3][4];int[] c = {10,20,30,40,50};System.out.println("b의 길이 : "+b.length);//출력 : 3System.out.println("");for(int x : c)sum = sum+x;System.out.println(sum);// 출력 : 150System.out.println("");System.out.println("");int num1[] = {10,20,30};int num2[] = {40,50,6..