Overview

In this tutorial, we will design the Raptor flowchart to find the factorial of a number. Factorial of a number is mathematically defined as follows:

n! = n*(n-1)*(n-2)… * 1

Factorial Flowchart

Pseudocode

/**
* NAME:
* DATE:
* FILE:
* COMMENTS:
*/

START
number = 0;
fact = 1;
PROMPT “Enter positive number to calculate factorial:”;
INPUT number;
PRINT “Entered number is=” + number;
WHILE (number <= 1)
{
fact = fact * number;
number = number – 1;
}
PRINT “Factorial of the number is =” + fact;
END

Flowchart

We will use two variables in the flowchart. One variable number to calculate the factorial. We will prompt the number from the user. The variables are initially assigned to