Java Programming Tutorial 42 - Iterate through 2D Structure with for Loop

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[lodashnotebook]

Nice touch there with the refactoring tool. Bonus learning! Thanks

[rittenbrake]

yea the refactoring rename tool is very useful thanks boss !

[marco]

how did we get 3 at 1:11? Is this because the total number of rows or the size of the array?

[caseyott]

In the second for loop at k < grades[i].length and in System.out.println(grades[i][k]), I keep getting an error for the two i's and the k inside the square brackets that says these cannot be resolved to a variable. Any help?

[JesseQuickEats]

When would you use a 2d array? Just want to know/see a quick example.

[davidcollinhannah]

For some reason I'm getting an error telling me that the data type should be a boolean in the for loops instead of an int.

import java.util.Arrays;

public class TwoDimensionalArrays {

public static void main(String[] args) {
int[][] studentGrades = {
{1, 5, 3},
{1, 4, 5, 6, 3, 5, 2},
{4, 6, 9}
};
//



for (int i = 0; studentGrades.length; i++) {
for (int k = 0; studentGrades[i].length; i++) {

}
}
}
}

[woodydameron]

Do you offer one on one time? Consulting?

[Willsheep-yuzt]

this code works just aswell as caleb's:


import java.util.Arrays;
import java.util.Scanner;

public class App{
public static void main(String[] args){

int[][] grades = {
{1, 2, 3, 73, 5},
{32, 3, 45, 435, 65, 7567, },
{456, 45, 64, 56}
};

for(int row =0; row<grades.length; row++){

}


}
}