printing patterns in c code example

Example 1: program to print pascal triangle

#include <stdio.h>
int main() {
   int rows, coef = 1, space, i, j;
   printf("Enter the number of rows: ");
   scanf("%d", &rows);
   for (i = 0; i < rows; i++) {
      for (space = 1; space <= rows - i; space++)
         printf("  ");
      for (j = 0; j <= i; j++) {
         if (j == 0 || i == 0)
            coef = 1;
         else
            coef = coef * (i - j + 1) / j;
         printf("%4d", coef);
      }
      printf("\n");
   }
   return 0;
}

Example 2: half pyramid in c

#include <stdio.h>
#define N 5
int main()
{
	int i,j;
	for(i=1;i<=N;i++)
		{
  			for(j=1;j<=i;j++)
    		printf("*");
  
  		printf("\n");
		}
  return 0;
}