Question

write c program to print the following pattern
01
0101
010101
01010101
0101010101
010101010101

Answer 1

Answer:

This is the required C program for the question.

#include <stdio.h>

int main()  {

   int n,i,j;

   printf("Enter number of rows - ");

   scanf("%d",&n);

   for(i=1;i<=n;i++)   {

       for(j=0;j<2*i;j++)

           printf("%d",j%2);

       printf("\n");

   }

   return 0;

}

Explanation:

• At first, we will ask the user to ask the number of rows, say n. Then, we will iterate a loop n times i.e., from i = 1 to n. (so as to print first n rows of the pattern).
• Then, to display the columns, we will create another loop. The loop iterates 2*i times where i is the row number (as each row contain 2n number of columns). So, here, the loop iterates from j = 1 to 2*i or we can write j = 0 to 2*i - 1.
• Then, inside the loop, we will display the value of j. j=0 initially. So, )%2=0, then j becomes 1. So, 1%2=1. In this way, we can solve this question.

See the attachment for output.