(Help) Enhanced loop multi array, logic and syntax errors

Question

ive been playing with the idea of multi arrays and enhanced for loops for about a week having just covered each of these ive been using google and trying to read others code can someone break it down for me and tell me any other errors ive made so i can understand better
https://code.sololearn.com/c9g3Etb1ejqV/?ref=app

Answer 1

// intended to print content of both arrays
public class Program
{
public static void main(String[] args) {
int[][] d2array = {{257,458},{2}};
/*declare 2darray ... with name d2array bcz no. can't be used in beginning of a variable name*/
for (int[] array_of_arrays:d2array){
//for variable array of arrays traverse 2darray
for(int k:array_of_arrays)
System.out.print(k+" ");
System.out.println();
}
}
}

Answer 2

i found this works it appears to work through flattening the array (thanks to garret rowe from coderanch)
https://code.sololearn.com/cuDLNCu3KZT4/?ref=app