Shell Programs Sum of n numbers

Ex. No.: 2(b)(i)

Shell Programs Sum of n numbers

AIM:

            To write a shell script to find the sum of n numbers.

ALGORITHM:

            Step 1: Start the program

           

            Step 2: Enter the value of n

            Step 3: Declare the variables of i and sum and both are initialized to zero.

            Step 4: Perform the addition of n numbers using while loop

            Step 5: Print the sum.

            Step 6 : Stop the program

SCRIPT:

while [ condition ]            do                  command1                  command2                  command3                  ..                  ....             done

            echo "Sum of n natural numbers \n”

echo "Enter the value of n "

read n

i = 0

sum = 0

while[$i –lt $n]

do

sum=’expr $sum + expr $i’

i = ‘expr $i + 1’

done

echo "Sum of n natural numbers are : $sum”

OUTPUT:

            [csestaff@localhost csestaff]$ sh sum.sh

Sum of n natural numbers

Enter the value of n : 3

Sum of n natural numbers are : 6

RESULT:

           

Thus, the shell script to find the sum of n natural numbers is entered and its output was verified.