C Program to Print Binary Numbers Pyramid Pattern

#include<stdio.h>
#include<conio.h>
void main()
{
int i,j;
int count = 1;

clrscr();

 for(i=1;i<=4;i++)
    {
    printf("\n");
        for(j=1;j<=i;j++)
        {
        printf("%d",count%2);
        count++;
        }
    if( i % 2 == 0)
           count=1;
    else
           count=0;
    }
getch();
}

---

Program Explanation :

We have declared some of the variables. We have declared count variable,

int count = 1;

First and Third Line is Starting with 1 , while 2nd and 4th Line is starting with 0, So for first and third line count will be 1 and for even line number count will be equal to 0.

Line Number	Value of Count
1	1
2	0
3	1
4	0
5	1

Outer for loop will decide the line. In this pyramid we need to print 5 lines so we have for loop which can execute 5 times.

for(i=1;i<=5;i++)
    {
    printf("n");

As each iteration of for loop is new line we need to print newline character on each line
below table explains how many times inner loop is executed -

Value of i	No of times inner Loop gets executed	Values of j
1	1	1
2	2	1 2
3	3	1 2 3
4	4	1 2 3 4

below lines will decide the value of count for next iteration -

if( i % 2 == 0)
       count=1;
else
       count=0;