# C Program to Print Triangle of Numbers in Reverse Pattern

Write a C program to print triangle of numbers in reverse pattern using for loop.

```#include <stdio.h>

int main()
{
int rows;

printf("Enter Triangle of Numbers in Reverse Rows = ");
scanf("%d", &rows);

printf("Triangle of Numbers in Reverse Order Pattern\n");

for (int i = rows; i >= 1; i--)
{
for (int j = 1; j < i; j++)
{
printf(" ");
}
for (int k = i; k <= rows; k++)
{
printf("%d ", k);
}
printf("\n");
}
}```

This C program prints the triangle pattern of numbers in descending order or reverse order using a while loop.

```#include <stdio.h>

int main()
{
int i, j, k, rows;

printf("Enter Triangle of Numbers in Reverse Rows = ");
scanf("%d", &rows);

printf("Triangle of Numbers in Reverse Order Pattern\n");
i = rows;

while (i >= 1)
{
j = 1;
while (j < i)
{
printf(" ");
j++;
}

k = i;
while (k <= rows)
{
printf("%d ", k);
k++;
}

printf("\n");
i--;
}
}```
``````Enter Triangle of Numbers in Reverse Rows = 9
Triangle of Numbers in Reverse Order Pattern
9
8 9
7 8 9
6 7 8 9
5 6 7 8 9
4 5 6 7 8 9
3 4 5 6 7 8 9
2 3 4 5 6 7 8 9
1 2 3 4 5 6 7 8 9 ``````

This C example uses the do while loop to print the triangle of numbers in reverse order pattern.

```#include <stdio.h>

int main()
{
int i, j, k, rows;

printf("Enter Triangle of Numbers in Reverse Rows = ");
scanf("%d", &rows);

printf("Triangle of Numbers in Reverse Order Pattern\n");
i = rows;

do
{
j = 1;
do
{
printf(" ");

} while (j++ < i);

k = i;
do
{
printf("%d ", k);

} while (++k <= rows);

printf("\n");

} while (--i >= 1);
}```
``````Enter Triangle of Numbers in Reverse Rows = 5
Triangle of Numbers in Reverse Order Pattern
5
4 5
3 4 5
2 3 4 5
1 2 3 4 5 ``````