Algorithm for factorial of a given number

Description:

Factorial of a number is nothing but the multiplication of numbers from a given number to 1 Ex: 5! =5*4*3*2*1= 120 

Algorithm: 

main program

Step 1: start Step 2: read n

Step 3: call the sub program fact(n) Step 4: print the f value

Step 5: stop

Sub program:

Step 1: initialize the f=1

Step 2: if n==0 or n=1 return 1 to main program. If not go to step 3 

Step 3: perform the looping operation as follows

For i=1 i<=n; i++ Step 4: f=f*i

Step 5: return f value to the main program

program

flow chart

algorithm