Multidimensional array coding question

Question

int[ ][ ] myArr = { {1, 2, 3}, {4}, {5, 6, 7} };
myArr[0][2] = 42;
int x = myArr[1][0]; // 4

What is the meaning of myArr[0][2] = 42?
Still cannot understand after reading comment under that topic

Thanks

Answer 1

myArr[0][2] = 42 i.e assagin 42 to the third position of first array

Answer 2

myArr[0][2] = 42 rewrites item on third position of first array. So basicaly it makes 42 from 3.. simple rewrite