Shell Math – Page 2

Shell Script to read price of an article and calculate discount

in Shell Math last updated April 4, 2008

#!/bin/bash
# Script to read price of an article. If the price is less than 100
# then display "No discount" else give a discount of 10%. Display
# the price of article after discount
# -------------------------------------------------------------------------
# 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 -n "Enter price of an article : "
read price

if [ $price -lt 100 ]
then
   echo "No discount "
   d=0 # 0 means no discount
else
   echo "10% discount "	
   d=$(( $price  * 10 / 100 )) # 10% discount
fi
# how much user need to pay? after discount
pay=$(( $price - $d ))
echo "You need to pay INR. $pay"

#!/bin/bash

# Script to read price of an article. If the price is less than 100

# then display "No discount" else give a discount of 10%. Display

# the price of article after discount

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

# 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 -n "Enter price of an article : "

read price

if [ $price -lt 100 ]

then

echo "No discount "

d=0 # 0 means no discount

else

echo "10% discount "

d=$(( $price * 10 / 100 )) # 10% discount

# how much user need to pay? after discount

pay=$(( $price - $d ))

echo "You need to pay INR. $pay"

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

in Shell Math last updated April 15, 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

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

in Shell Math last updated April 4, 2008

#!/bin/bash
# Shell script to read 3 numbers and find the greaters of the three
# -------------------------------------------------------------------------
# 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 -n "Please enter three numbers (separate number by space) : "
read a b c
# compare a with b and c. Note -a is logical and operator
if [ $a -gt $b -a $a -gt $c ]
then
   big=$a
elif  [ $b -gt $a -a $b -gt $c ] # compare b with a and c
then
   big=$b
elif  [ $c -gt $a -a $c -gt $b ] # compare c with a and b
then
   big=$c
elif [ $a -eq $b -a $a -eq $c -a $b -eq $c -a $c -eq $b ] # see if all of them are equal or not
then
   big="All three numbers are same (equal)"
else # something must be wrong if we are here, like one of number is character such as 'A'
   big="Can not guess greaters of three numbers"
fi
# display result 
echo "Result : $big"

#!/bin/bash

# Shell script to read 3 numbers and find the greaters of the three

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

# 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 -n "Please enter three numbers (separate number by space) : "

read a b c

# compare a with b and c. Note -a is logical and operator

if [ $a -gt $b -a $a -gt $c ]

then

big=$a

elif [ $b -gt $a -a $b -gt $c ] # compare b with a and c

then

big=$b

elif [ $c -gt $a -a $c -gt $b ] # compare c with a and b

then

big=$c

elif [ $a -eq $b -a $a -eq $c -a $b -eq $c -a $c -eq $b ] # see if all of them are equal or not

then

big="All three numbers are same (equal)"

else # something must be wrong if we are here, like one of number is character such as 'A'

big="Can not guess greaters of three numbers"

# display result

echo "Result : $big"

Shell Script Convert Fahrenheit to Celsius Temperature ( Celsius to Fahrenheit Temperature )

in Decision Making, Shell Math last updated February 3, 2009

Explains how to write temperature conversion formulas shell script to convert Fahrenheit to Celsius or vise versa.

Shell Script to read the base and height of a traingle and find its area

in Shell Math last updated April 3, 2008

Calculating the area of a triangle is an elementary problem encountered often in many different situations. The best known, and simplest formula is

Where S is area, b is the length of the base of the triangle, and h is the height or altitude of the triangle. The term ‘base’ denotes any side, and ‘height’ denotes the length of a perpendicular from the point opposite the side onto the side itself.

# Shell program/script to read the base and height of a traingle and find its area
# -------------------------------------------------------------------------
# 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.
# -------------------------------------------------------------------------
# Formula info: http://www.mste.uiuc.edu/dildine/heron/triarea.html

# Area=(1/2) x Base x Height
echo -n "Enter base of a triangle : "
read b

echo -n "Enter height of a triangle : "
read h
# calculate it and display back
area=$(echo "scale=2;(1/2) * $b * $h"|bc)
echo "Area of a triangle is $area"

# Shell program/script to read the base and height of a traingle and find its area

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

# 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.

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

# Formula info: http://www.mste.uiuc.edu/dildine/heron/triarea.html

# Area=(1/2) x Base x Height

echo -n "Enter base of a triangle : "

read b

echo -n "Enter height of a triangle : "

read h

# calculate it and display back

area=$(echo "scale=2;(1/2) * $b * $h"|bc)

echo "Area of a triangle is $area"