C program to display the following pattern of numbers.

1

1    2

1    2    3

1    2    3    4

1    2    3    4    5

1    2    3    4    5    6

1    2    3    4    5    6    7

Program code

#include <stdio.h>

#include <conio.h>

void main()

{

int inner, outer, rows=1;

clrscr();

printf(“How many rows do you want to see? \n”);

scanf(“%d”, &rows);

printf(“The pattern is displayed below.\n”);

for (outer=1;outer<=rows;outer++)

{

for (inner=1;inner<=outer;inner++)

printf(“%d\t”,inner);

printf(“\n\n”);

}

getch();

}

Example of output

How many rows do you want to see?

7

The pattern is displayed below.

1

1    2

1    2    3

1    2    3    4

1    2    3    4    5

1    2    3    4    5    6

1    2    3    4    5    6    7