C Exercises: Find the sum of lower triangular elements of a matrix
C Array: Exercise-75 with Solution
Write a program in C to find the sum of lower triangular elements of a matrix.
Pictorial Presentation:

Sample Solution:
C Code:
#include <stdio.h>
int main()
{
int R, C, n, r, c, sum=0;
int arr1[3][3]={{1, 2, 3},
{4, 5, 6},
{7, 8, 9}};
R = C = n = 3;
int i,j;
//------------- print original array ------------------
printf("The given array is : \n");
for(i = 0; i < R; i++)
{
for (j=0;j<C;j++)
{
printf("%d ", arr1[i][j]);
}
printf("\n");
}
//------------------------------------------------------
printf("The elements being summed of the lower triangular matrix are: ");
for(r = 0; r < R; r++)
{
for(c = 0; c < C; c++)
{
if(r > c)
{
printf("%d ",arr1[r][c]);
sum += arr1[r][c];
}
}
}
printf("\nThe Sum of the lower triangular Matrix Elements are: %d", sum);
return 0;
}
Sample Output:
The given array is : 1 2 3 4 5 6 7 8 9 The elements being summed of the lower triangular matrix are: 4 7 8 The Sum of the lower triangular Matrix Elements are: 19
Flowchart:

C Programming Code Editor:
Improve this sample solution and post your code through Disqus.
Previous: Write a program in C to find the sum of upper triangular elements of a matrix.
Next: Write a program in C to find largest number possible from the set of given numbers.
What is the difficulty level of this exercise?
Inviting useful, relevant, well-written and unique guest posts
- New Content published on w3resource :
- Python Numpy exercises
- Python GeoPy Package exercises
- Python Pandas exercises
- Python nltk exercises
- Python BeautifulSoup exercises
- Form Template
- Composer - PHP Package Manager
- PHPUnit - PHP Testing
- Laravel - PHP Framework
- Angular - JavaScript Framework
- React - JavaScript Library
- Vue - JavaScript Framework
- Jest - JavaScript Testing Framework