Input a matrix in 3-D array and check if it is identity matrix or not – Simple loop and array question , matrix question , 2d array question

Input a matrix in 3-D array and check if it is identity matrix or not – Simple loop and array question , matrix question , 2d array question

IN JAVA LANGUAGE :

package com.company;

import java.util.Scanner;

public class identityMatrix
{
    public static void main(String args[])
    {
        Scanner sc = new Scanner(System.in);

        int[][] arr = new int[3][3];
        int i,j;
        System.out.println("Input values in matrix : ");
        for(i = 0 , i<3 , i++)
        {
            for (j = 0 ; j<3 ; j++)
            {
                arr[i][j] = sc.nextInt();
            }
        }

        boolean flag = false;
        for(i = 0 , i<3 , i++)
        {
            for (j = 0 ; j<3 ; j++)
            {
                if( i == j ) {
                    arr[i][j] == 1;
                    break;
                }
                if( i != j ) {
                    arr[i][j] == 0;
                    break;
                }
            }
        }
        
        if (i==3 && j == 3)
        {
            System.out.println("Identity Matrix");
        }
        else
        {
            System.out.println("Not identity matrix");
        }

    }
}

IN C LANGUAGE :

#include<stdio.h>
int main(int argc, char const *argv[])
{
int arr[10][10],r,c,i,j,flag=0;
printf(“enter the no of rows and columns=\n”);
scanf(“%d%d”,&r,&c);
printf(“enter the elements:\n”);
{
for(i=0; i<r; i++)
{
for(j=0; j<c; j++)
scanf(“%d” ,&arr[i][j]);

}
}
for(i=0; i<r; i++)
{
for(j=0; j<c; j++)
{
if(i==j && arr[i][j]!=1)
{
flag=-1;
break;
}
else if (i!=j && arr[i][j]!=0)
{
flag = -1;
break;
}
}
}
if(flag==0)
{
printf(“it is an identity matrix\n”);

}
else
{
printf(“not an identity matrix\n”);

}
return 0;
}

Programmed by : Sadhana

Topics Covered :

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