To print Pascal triangle using numbers

This program is used to print the Pascal triangle using numbers.

Logic:

• Get the number of rows from the user.
• Then print the corresponding spaces for each row.
• Check the position whether it is a boundary or intermediate.
• If it is boundary prints the value one.
• Then other positions are printed by adding two elements in the upper row.

Program:

#include<stdio.h>
void main()
{
	int i,j,a,n,k;
	clrscr();
	printf("enter the row:");
	scanf("%d",&n);
	for(i=0;i<n;i++)
	{
		for(k=i+1;k<n;k++)
		{
			printf(" ");
		}
		for(j=0;j<=i;j++)
		{
			if(j==0||j==i)//prints first and last element in all rows
			{
				a=1;
			}
			else//it prints the intermediate values
			{
				a=a*(i-j+1)/j;
			}
			printf("%d ",a);
		}printf("\n");
	}
	getch();
}