C Program Pattern28

 #include<stdio.h>

#include<conio.h>

void main()

{

int i, j, no;

clrscr();

printf("Enter number: ");

scanf("%d", &no);

for(i=1; i<=no; i++)

{

for(j=1; j<=i; j++)

{

printf("%d ", (i+j-1)%2);

}

printf("\n");

}

getch();

}

/*

Output:

Enter number: 5

1

0 1

1 0 1

0 1 0 1

1 0 1 0 1

*/