c program to know a matrix is identity or not | matrix examples in c

Array programs collection C

/* to know a matrix of order n is identity or not

1 0 0

0 1 0

0 0 1

*/

#include<stdio.h>

int main()

{

int n,i,j,is_Identity=0;

printf("enter the size of matrix\n");

scanf("%d",&n);

int matrix[n][n];

printf("enter elements of given matrix\n");

for(i=0;i<=n-1;i++)

{

for(j=0;j<=n-1;j++)

{

scanf("%d",&matrix[i][j]);

}

}

for(i=0;i<=n-1;i++)//loop iteration for row

{

for(j=0;j<=n-1;j++)//loop iteration for column

{

if((i==j && matrix[i][j]!=1)||(i!=j && matrix[i][j]!=0))// checking the condition

// two conditons to bes tested

//Check if the current element is on the diagonal (i == j)

        // In the identity matrix, diagonal elements must be 1

        // Also check if the element is not on the diagonal (i != j)

        // In identity matrix, non-diagonal elements must be 0

is_Identity=1;

break;

}

}

printf("the matrix is:\n");

for(i=0;i<=n-1;i++)

{

for(j=0;j<=n-1;j++)

{

printf("%5d",matrix[i][j]);

}

printf("\n");

}

if(is_Identity==0)

{

printf("The matrix is identity");

}

else

{

printf("the matrix is not identity");

}

return 0;

}

Output:-

c program to know a matrix is identity or not

c program to print sum of two matrices of order mxn | 2D Array-matrix examples

Array programs in C 

/* to find sum of two matrix of order mxn

*/

#include<stdio.h>

int main()

{

int m,n,i,j;

printf("enter m as rows and n as columns\n");

scanf("%d%d",&m,&n);//if m=3 then the loop would run for 0,1,2

int m1[m][n],m2[m][n];

printf("enter elements for first matrix m1\n");

for(i=0;i<=m-1;i++)

{

for(j=0;j<=n-1;j++)

{

printf("enter element for location %d %d\n",i,j);

scanf("%d",&m1[i][j]);

}

}

printf("enter elements for second matrix m2\n");

for(i=0;i<=m-1;i++)

{

for(j=0;j<=n-1;j++)

{

printf("enter element for location %d %d\n",i,j);

scanf("%d",&m2[i][j]);

}

}

printf("the sum of two matrices is:\n");

for(i=0;i<=m-1;i++)

{

for(j=0;j<=n-1;j++)

{

printf("%d",m1[i][j]+m2[i][j]);

}

printf("\n");

}

return 0;

}

Output:-

c program to find sum of two matrices

c program to print transpose of matrix of order 3x2 | 2D Array-matrix examples

 Array programs collections

/* program to find transpose of given matrix of order 3x2

*/

#include<stdio.h>

int main()

{

int matrix[3][2];

int i,j;

for(i=0;i<=2;i++)

{

for(j=0;j<=1;j++)

{

printf("data for %d %d location is:",i,j);

scanf("%d",&matrix[i][j]);

}

}

printf("the matrix before transpose is:\n");

for(i=0;i<=2;i++)

{

for(j=0;j<=1;j++)

{

printf("%d",matrix[i][j]);

}

printf("\n");

}

printf("the matrix after transpose is:\n");

for(i=0;i<=1;i++)

{

for(j=0;j<=2;j++)

{

printf("%d",matrix[j][i]);

}

printf("\n");

}

return 0;

}

Output:

c program to transpose a matrix