how to fill a 2d array in java
int rows = 5, column = 7;
int[][] arr = new int[rows][column];
//2D arrays are row major, so always row first
for (int row = 0; row < arr.length; row++)
{
for (int col = 0; col < arr[row].length; col++)
{
arr[row][col] = 5; //Whatever value you want to set them to
}
}adding elements in a specified column or row in a two dimensional array java
/* After the prompt code segment and sumOfCol in the main method */
// Row (major index)
for (int row = 0; row < matrix.length; row++) {
int rowSum = 0;
for (int col = 0; col < matrix[row].length; col++) {
rowSum += matrix[row][col];
}
System.out.println("Sum of the elements at row " + row + " is: " + rowSum);
}
// Column (minor index)
// Assuming the length of each row is the same
for (int col = 0; col < matrix[0].length; col++) {
int colSum = 0;
for (int row = 0; row < matrix.length; row++) {
colSum += matrix[row][col];
}
System.out.println("Sum of the elements at col " + col + " is: " + colSum);
}Copyright © 2021 Codeinu
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