Hello! I would like to ask what is the use of myArr[0][2] = 42; in the code below (which is one of code example in Java's lesson)?
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][0];
System.out.println(x);
}
}
I have tried to remove myArr[0][2] = 42; and the output is still the same with or without, which made me curious what is the purpose?
Rei
myArr[0][2] = 42
means assigning a numerical value to 3rd column in row 0,
remember indexing starts from 0
You are printing the value of myArr[1][0] i.e value of 1st (0th) column in 2nd row
print the value of myArr[0][2];
Manual
Shouldn't the array representation be like this
[1] [2] [3]
[4]
[5] [6] [7]
instead of what you have drawn?
else value [3] should have been overwritten with 42, not 5
Rei
Arrays contain values within given indexes.
Your code prints [1],[0] which is 4
If the array is drawn as x by y. It starts like this.
[1][4][5]
[2] [6]
[3] [7]
~ swim ~ Manual
Thank you very much!!
I understand what it means now and tried to print x with int x = myArr[0][2] and the value became to 42. Thank you very much for explaining in details!!
