To understand better(explain)

Question

public class Program {
public static void main(String[] args) {
int[ ][ ] myArr = { {1, 2, 3}, {4}, {5, 6, 7} };
myArr[0][2] = 42;
int x = myArr[1][1];

System.out.println(x);
}
}
Output: exception error
public class Program {
public static void main(String[] args) {
int[ ][ ] myArr = { {1, 2, 3}, {4}, {5, 6, 7} };
myArr[0][2] = 42;
int x = myArr[2][1];

System.out.println(x);
}
}
Output:6

Answer 1

The second row of array <myArr> only has one column { 4 }. The first code tried to refer myArr[1][1] (second column of the second row) which does not exist.

The second code refers to the second column of the third row, there's no problem, as the third row has three columns { 5, 6, 7 }

Answer 2

Kiibo Ghayal,

I think he want someone to explain the code like what Ipang did.

Thanks for your question and happy coding.

Answer 3

Obviously 1st part of your program will give error because myArr[1][1] means 2nd array's 2nd number which you didn't include in the declaration.

2nd part of your program will run because myArr[2][1] exist .It means 3rd array's 2nd number which is 6.So it gives output 6.

Answer 4

Kiibo ghayal,

I agree too bro.