﻿ C Program: Display the upper triangular of a given matrix - w3resource

# C Exercises: Display the upper triangular of a given matrix

## C Array: Exercise-27 with Solution

Write a program in C to print or display an upper triangular matrix.

Pictorial Presentation:

Sample Solution:

C Code:

``````#include <stdio.h>

void main()
{
int arr1[10][10],i,j,n;
float determinant=0;

printf("\n\nDisplay the upper triangular of a given matrix :\n");
printf("----------------------------------------------\n");

printf("Input the size of the square matrix : ");
scanf("%d", &n);
printf("Input elements in the first matrix :\n");
for(i=0;i<n;i++)
{
for(j=0;j<n;j++)
{
printf("element - [%d],[%d] : ",i,j);
scanf("%d",&arr1[i][j]);
}
}
printf("The matrix is :\n");
for(i=0;i<n;i++)
{
for(j=0;j<n ;j++)
printf("% 4d",arr1[i][j]);
printf("\n");
}

printf("\nSetting zero in upper triangular matrix\n");
for(i=0;i<n;i++)
{
printf("\n");
for(j=0;j<n;j++)
if(i>=j)
printf("% 4d",arr1[i][j]);
else
printf("% 4d",0);
}
printf("\n\n");
}
```
```

Sample Output:

```Display the upper triangular of a given matrix :
----------------------------------------------
Input the size of the square matrix : 3
Input elements in the first matrix :
element - [0],[0] : 1
element - [0],[1] : 2
element - [0],[2] : 3
element - [1],[0] : 4
element - [1],[1] : 5
element - [1],[2] : 6
element - [2],[0] : 7
element - [2],[1] : 8
element - [2],[2] : 9
The matrix is :
1   2   3
4   5   6
7   8   9
Setting zero in upper triangular matrix

1   0   0
4   5   0
7   8   9
```

Flowchart:

C Programming Code Editor:

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## C Programming: Tips of the Day

C Programming - What is the argument for printf that formats a long?

Put an l (lowercased letter L) directly before the specifier.

```unsigned long n;
long m;

printf("%lu %ld", n, m);
```

Ref : https://bit.ly/3dIwfkP