Program to Generate Pascal's Triangle in C | C Program

Here's a C program to generate Pascal's triangle with output. This program makes use of C concepts like For loop, While loop, IF-Else Condition, Nested Loops etc.

Pascal's Triangle

# include <stdio.h>
# include <conio.h>
void main() 
{ 
 int b, p, q, r, x ; 
 clrscr() ; 
 b = 1 ; 
 q = 0 ; 
 printf("Enter the number of rows : ") ; 
 scanf("%d", &p) ; 
 printf("\nPascal's triangle is : \n\n") ; 
 while (q < p) 
 { 
  for(r = 40 - 3 * q ; r > 0 ; --r) 
   printf(" ") ; 
  for(x = 0 ; x <= q ; ++x) 
  { 
   if((x == 0) || (q == 0)) 
    b = 1 ; 
   else 
    b = (b * (q - x + 1)) / x ; 
   printf("%6d", b) ; 
  } 
  printf("\n\n") ; 
  ++q ; 
 } 
 getch() ; 
} 

Output of above program is 

Enter the number of rows : 5

Pascal's triangle is :

        1

      1  1

    1  2  1

  1  3  3  1

1  4  6  4  1