I have a 2d array and I want to know how do you set the first value so if my array was
int array[a][b] = int[10][10];
How would you access index 'a' in a for loop?
This is my simple code that I am working on thanks in advance
int[][] timesTable = new int[12][12];
for(int i = 0; i < timesTable.length; i++){
timesTable[i][i] = i + 1;//can't set the first index with this value
System.out.println(timesTable[i]);
}
I hope you are not putting the "a" and "b" in the array declaration.
int array[][] = int[10][10];
A 2D array is array of arrays. The index "a" or what you are trying to set is another array.
timesTable[i][i] = i + 1;//can't set the first index with this value
The above can be written like this:
timesTable[i] = {1,2,3};// puts another array at index i
You access your array using [], which you'll need to do n times for an n-dimensional array if you're trying to access a particular element.
If you're simply trying to set the first element, then you can do:
array[0][0] = 100; // some number
If you want to iterate over each element in the entire 2d array, you'll need 2 loops, one for each dimension, like so:
for ( int i = 0; i < array.length; ++i ) {
for ( int j = 0; j < array[i].length; ++j ) {
array[i][j] = i + j; // or whatever you want to set the elements to
System.out.println( array[i][j] );
}
}
