Script to display sum of two number and to do calculations such as +, -, / etc

by Vivek Gite on April 4, 2008

#!/bin/bash
# Script to display sum of two number and to do calculations such as +, -, / etc
# -------------------------------------------------------------------------
# Copyright (c) 2005 nixCraft project <http://cyberciti.biz/fb/>
# This script is licensed under GNU GPL version 2.0 or above
# -------------------------------------------------------------------------
# This script is part of nixCraft shell script collection (NSSC)
# Visit http://bash.cyberciti.biz/ for more information.
# ----------------------------------------------------------------------
echo "**** My calculator ****"
echo "M A I N - M E N U"
echo "1. Multiplication"
echo "2. Subtraction"
echo "3. Remainder"
echo "4. Divide"
echo -n "Please select your choice (1-4) : "
read choice
echo -n "Enter your first number : "
read n1
echo -n "Enter your second number : "
read n2
if [ $choice -eq 1 ]
then
	answer="$n1 x $n2 = $(( $n1 * $n2 ))"
elif [ $choice -eq 2 ]
then
	answer="$n1 - $n2 = $(( $n1 - $n2 ))"
elif [ $choice -eq 3 ]
then
	answer="$n1 % $n2 = $(( $n1 % $n2 ))"
elif [ $choice -eq 4 ]
then
	answer="$n1 / $n2 = $(( $n1 / $n2 ))"
else
	echo "Sorry please select number between 1-4 only"
	exit 1
fi
echo $answer

#!/bin/bash

# Script to display sum of two number and to do calculations such as +, -, / etc

# -------------------------------------------------------------------------

# This script is licensed under GNU GPL version 2.0 or above

# -------------------------------------------------------------------------

# This script is part of nixCraft shell script collection (NSSC)

# Visit http://bash.cyberciti.biz/ for more information.

# ----------------------------------------------------------------------

echo "**** My calculator ****"

echo "M A I N - M E N U"

echo "1. Multiplication"

echo "2. Subtraction"

echo "3. Remainder"

echo "4. Divide"

echo -n "Please select your choice (1-4) : "

read choice

echo -n "Enter your first number : "

read n1

echo -n "Enter your second number : "

read n2

if [ $choice -eq 1 ]

then

answer="$n1 x $n2 = $(( $n1 * $n2 ))"

elif [ $choice -eq 2 ]

then

answer="$n1 - $n2 = $(( $n1 - $n2 ))"

elif [ $choice -eq 3 ]

then

answer="$n1 % $n2 = $(( $n1 % $n2 ))"

elif [ $choice -eq 4 ]

then

answer="$n1 / $n2 = $(( $n1 / $n2 ))"

else

echo "Sorry please select number between 1-4 only"

exit 1

echo $answer

Tagged as: bash script, calculator, echo command, fi, if command, mathematics, menu based script, multiplication, read command, remainder, shell script, subtraction

{ 5 comments… add one }

Rendy April 29, 2013, 2:16 pm
why ,if I input -1 + 0.009 = -,991 . Where is these zero??
Reply Link
bikash May 6, 2012, 8:22 pm
this is modular division not division
Reply Link
dhruv February 3, 2012, 3:17 am
hi this is good but i am getting only 0 in division ….
Reply Link
Mohamed April 12, 2011, 3:59 am
Hi ! everything is working fine. Thanks
but when i try to print * . it prints all the files in the current directory. I am new to Unix so please help me out.
Thanks :)
Reply Link
OPEOLUWA November 13, 2009, 2:04 pm
THIS REALY IS OF HELP TO ME
THANKS GUY
Reply Link

Next Script: Shell Script to read price of an article and calculate discount

Previous Script: Shell script to read 3 numbers and find the greaters of the three