Write Script, using case statement to perform basic math operation as

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rajeshkumar created the topic: Write Script, using case statement to perform basic math operation as

Write Script, using case statement to perform basic math operation as
follows
+ addition
– subtraction
x multiplication
/ division
The name of script must be ‘q4’ which works as follows
$ ./q4 20 / 3, Also check for sufficient command line arguments

#!/bin/bash
#
# Linux Shell Scripting Tutorial 1.05r3, Summer-2002
#
# Written by Vivek G. Gite
#
# Latest version can be found at http://www.nixcraft.com/
#
# Q4
#

if test $# = 3
then
case $2 in
+) let z=$1+$3;;
-) let z=$1-$3;;
/) let z=$1/$3;;
x|X) let z=$1*$3;;
*) echo Warning - $2 invalied operator, only +,-,x,/ operator allowed
exit;;
esac
echo Answer is $z
else
echo "Usage - $0 value1 operator value2"
echo " Where, value1 and value2 are numeric values"
echo " operator can be +,-,/,x (For Multiplication)"
fi

#
# ./ch.sh: vivek-tech.com to nixcraft.com referance converted using this tool
# See the tool at http://www.nixcraft.com/uniqlinuxfeatures/tools/
#

Regards,
Rajesh Kumar
Twitt me @ twitter.com/RajeshKumarIn