(Linux) 1. Write shell scripts to solve the following problems: a. Write a shell

Question

(Linux)

1. Write shell scripts to solve the following problems:

a. Write a shell script which will accept up to 9 words as arguments and display each of the words in
uppercase.

b. Write a shell script which will accept an unlimited number of integers as command line arguments.
Your script shall calculate and output the sum of these integers.

c. Write a shell script which will accept two integers as arguments then compute and output their
product. Display an appropriate error if two arguments are not provided.

Explanation / Answer

1)

# Changing all the command line argument to upper case.

echo $@ | tr '[a-z]' '[A-Z]'

b)

# Initializing the value of sum to zero

sum = 0

for i in $@; # Passing through each argument

do

sum = $sum + $i # Summing the argument

done

echo "$sum" # Displaying the sum of the arguments

c)

# Checking number of arguments supplied

if [ $# -ne 2 ]; then

echo -e " Please provide correct number of arguments"

else

# $1 is the first argument and $2 is the second

echo " Sum of $1 + $2 is `expr $1 + $2`"

fi

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