Write as shell program to find the sum of n natural numbers.

Write as shell program to find the sum of n natural numbers.

echo -n "Enter number : "

read n

# store single digit

i=1

# store number of digit

sum=0

# use while loop to caclulate the sum of all digits

while [ $i -le $n ]

  do

   sum=$(( $sum + $i )) # calculate sum of digit

        i=$(( $i + 1 ))

  done

echo  "Sum of all digit  is $sum"

OUTPUT:-

[mca1@dump mca1]$ ./ar.sh

Enter number : 4

Sum of all digit  is 10