CALCULATING FACTORIAL OF A GIVEN NUMBER

Aim :

To write a shell program to find the factorial of a given number.

Algorithm :

1.Read the number.
2.Initialize the value of i and factorial f to 1.
3.While the value of i is less than the number find the value of factorial by multiplying i and f.
4.Increment the value of i by 1.

5. Display the result.

Program

#Factorial program

echo Enter a number

read n

i=1

f= 1

if test $n -eq 0

then

echo factorial is 1

else

while test $i -le $n

do

f= ‘expr $f\ * $1’
i=expr$i+ 1’

done

echo Factorial is $f

fi

Output:

Enter a number
5
Factorial is 120

Result:
Thus the program is written and executed to find the factorial of the given
number.