C Program to Print Pascal Traingle

C Program for printing the Pascal Triangle up to given number of rows.

What is Pascal Triangle?

In simple, Pascal Triangle is a Triangle form which, each number is the sum of immediate top row near by numbers. The Value of edge is always 1.

C Program for Pascal Triangle

#include <stdio.h>
int main()
{
    int rows, cal = 1, space, i, j;

    printf("Enter number of rows: ");//enter number of rows for generating the pascal triangle
    scanf("%d",&rows);

    for(i=0; i<rows; i++)            // outer loop for displaying rows
    {
        for(space=1; space <= rows-i; space++)  // space for every row starting
            printf("  ");

        for(j=0; j <= i; j++)     // inner loop for displaying the pascal triangle of numbers
        {
            if (j==0 || i==0)     // either outer loop value or inner-loop value is "0 " it prints 1
                cal = 1;
            else
                cal = cal*(i-j+1)/j;  //calculate the coefficient

            printf("%4d", cal);
        }
        printf("\n");
    }

    return 0;
}

 OUTPUT for PASCAL Triangle

Enter number of rows: 5
             1
           1   1
         1   2   1
       1   3   3   1
     1   4   6   4   1