FACTORIAL OF A NUMBER --- unix lab

FACTORIAL OF A NUMBER

AIM:

            To write a Shell Program to find the factorial of a Number.

ALGORITHM:

Step 1: Start

Step 2: Read the Number as ‘n’

Step 3: Assign the value of ‘p’ as 0 and solve the expression i = n-1

Step 4: While the value of ‘i’ is greater than or equal to 1 do the following steps.

Step 5: Solve the expression n=n*1 and i=i-1 (Decrementing Operation)

Step 6: Then print the value of ‘n’ as the factorial of the given number.

Step 7: Stop.

SHELL PROGRAM:

echo "Enter a Number"

read n

i=`expr $n - 1`

p=1

while [ $i -ge 1 ]

do

n=`expr $n \* $i`

i=`expr $i - 1`

done

echo "The Factorial of the given Number is $n"

SAMPLE OUTPUT:

[Cseb19@sathish-desktop]# sh fact.sh

Enter a Number

5

The Factorial of the given Number is 120

RESULT:

            Thus the Shell Program to find the factorial of the Number was executed and the output was verified.