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C program to print the upper triangular matrix

Here, we are going to learn how to print the upper triangular matrix in C programming language?
Submitted by Nidhi, on July 15, 2021

Problem statement

Given a 3x3 matrix, we have to print the upper triangular matrix using C program.

Printing the upper triangular matrix

The source code to print the upper triangular matrix is given below. The given program is compiled and executed using GCC compile on UBUNTU 18.04 OS successfully.

C program to print the upper triangular matrix

// C program to print the upper triangular matrix

#include <stdio.h>

int main()
{
    int Matrix[3][3] = {
        { 9, 8, 7 },
        { 5, 4, 6 },
        { 1, 2, 3 }
    };

    int i, j;

    printf("Matrix:\n");
    for (i = 0; i < 3; ++i) {
        for (j = 0; j < 3; ++j) {
            printf("%d ", Matrix[i][j]);
        }
        printf("\n");
    }

    printf("\nUpper triangular matrix is: \n");
    for (i = 0; i < 3; i++) {

        for (j = 0; j < 3; j++) {
            if (j >= i)
                printf("%d ", Matrix[i][j]);
            else
                printf("  ");
        }
        printf("\n");
    }
    return 0;
}

Output

Matrix:
9 8 7 
5 4 6 
1 2 3 

Upper triangular matrix is: 
9 8 7 
  4 6 
    3 

Explanation

Here, we created a 3X3 matrix that contains integer elements. Then we printed matrix elements and the upper triangular matrix on the console screen.

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