Input numbers in 2d array and find the sum of each row, column, right and left diagonal in Java
Two Dimensional Array - Question 7
In this question, we will see how to input numbers in a 3X3 integer matrix (2d array) and find the sum of each row, each column, right diagonal and left diagonal separately in Java programming. To know more about two dimensional array click on the two dimensional array lesson.
Q7) Write a program in Java to input numbers in a 3X3 integer matrix (2d array) and find the sum of each row, each column, right diagonal and left diagonal separately. Right Diagonal = / and Left Diagonal = \.
Program
import java.util.Scanner;
public class Q7
{
public static void main(String args[])
{
int a[][]=new int[3][3], r,c,rs,cs,rd=0,ld=0;
Scanner sc=new Scanner(System.in);
System.out.println("Enter 9 numbers");
for(r=0; r<3; r++)
{
for(c=0; c<3; c++)
{
a[r][c]=sc.nextInt();
}
}
for(r=0; r<3; r++)
{
rs=0;
cs=0;
ld=ld+a[r][r];
rd=rd+a[r][2-r];
for(c=0; c<3; c++)
{
System.out.print(a[r][c]+" ");
rs=rs+a[r][c]; // row sum
cs=cs+a[c][r]; // column sum
}
System.out.println(" Row Sum = "+rs+" Column Sum = "+cs);
}
System.out.println("Left Diagonal Sum = "+ld);
System.out.println("Right Diagonal Sum = "+rd);
}
}Output
Enter 9 numbers 18 12 72 10 15 45 38 5 64 18 12 72 Row Sum = 102 Column Sum = 66 10 15 45 Row Sum = 70 Column Sum = 32 38 5 64 Row Sum = 107 Column Sum = 181 Left Diagonal Sum = 97 Right Diagonal Sum = 125
