# Triangle number pattern using 0, 1 in C – 2

Write a C program to print the given triangle number pattern using 0, 1. How to print the given triangle number pattern with 0, 1 using for loop in C programming. Logic to print the given triangle number pattern with 0, 1 in C program.

Example

Input

`Input N: 5`

Output

## Logic to print the given triangle number pattern

1. The pattern consists of N rows (where N is the total number of rows to be printed). Hence the outer loop formation to iterate through rows will be for(i=1; i<=N; i++).
2. Each row contains exactly i number of columns (where i is the current row number) i.e. first row contains 1 column, 2 row contains 2 column and so on.
Hence the inner loop formation to iterate through columns will be for(j=1; j<=i; j++).
3. Once you are done with the loop semantics, you just need to print the number. If you notice the numbers are in special order. For each odd rows 1 gets printed and for each even rows 0 gets printed. Now to implement this we need to check a simple condition if(i % 2 == 1) before printing 1s or 0s.

Lets, now implement this in C program.

## Program to print given triangle number pattern

``````/**
* C program to print the given number pattern
*/

#include <stdio.h>

int main()
{
int i, j, N;

printf("Enter N: ");
scanf("%d", &N);

for(i=1; i<=N; i++)
{
for(j=1; j<=i; j++)
{
// Print 1s for every odd rows
if(i % 2 == 1)
{
printf("1");
}
else
{
printf("0");
}
}

printf("\n");
}

return 0;
}``````

Output

```Enter N: 5
1
00
111
0000
11111```

You can also print this pattern without using if else. Below is a tricky approach to print the given number pattern without using if else. It uses bitwise operator to check even odd.

## Program to print the given number pattern without using if

``````/**
* C program to print the given number pattern
*/

#include <stdio.h>

int main()
{
int i, j, N;

printf("Enter N: ");
scanf("%d", &N);

for(i=1; i<=N; i++)
{
for(j=1; j<=i; j++)
{
printf("%d", (i & 1));
}

printf("\n");
}

return 0;
}``````

Note: You can also get the below pattern with the same logic

What you need to do is, swap the two printf(); statements. Replace the printf("1"); with printf("0"); and vice versa.
Happy coding 😉 