How To Use Bc bash Calculator In A Shell Script

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How To Use Bc (bash Calculator) In A Shell Script?

Asked On2019-06-18 16:08:10 by:gokilapriya

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The basic calculator can be used in a terminal by simply entering bc, after which you can type regular math expressions like this:

4+3

...to get a result like this:

When performing a series of calculations repeatedly, it makes sense to use the bc calculator as part of a script. The simplest form of such a script would look something like this:

#!/bin/bash

echo '6.5 / 2.7' | bc

The first line is just the path the executable that runs this script.

The second line contains two commands. The echo command generates a string containing the mathematical expression contained in single quotes (6.5 divided by 2.7, in this example). The pipe operator (|) passes this string as an argument to the bc program. The output of the bc program is then displayed on the command line.

In order to execute this script, open a terminal window and navigate to the directory where the script is located. We'll assume the script file is called bc_script.sh. Make sure the file is executable using the chmod command:

chmod 755 bc_script.sh

Then you would enter:

./bc_script.sh

The result would be the following:

Answerd on:2019-07-15 Answerd By:KAPILJHADE

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bc command is used for command line calculator. It is similar to basic calculator by using which we can do basic mathematical calculations.

Arithmetic operations are the most basic in any kind of programming language. Linux or Unix operating system provides the bc command and expr command for doing arithmetic calculations. You can use these commands in bash or shell script also for evaluating arithmetic expressions.

Syntax

bc [ -hlwsqv ] [long-options] [ file ... ]

Options:

-h, {- -help } : Print the usage and exit

-i, {- -interactive } : Force interactive mode

-l, {- -mathlib } : Define the standard math library

-w, {- -warn } : Give warnings for extensions to POSIX bc

-s, {- -standard } : Process exactly the POSIX bc language

-q, {- -quiet } : Do not print the normal GNU bc welcome

-v, {- -version } : Print the version number and copyright and quit

Answerd on:2021-12-28 Answerd By:Akhil-Dev-D

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How To Use Bc (bash Calculator) In A Shell Script?

How To Use Bc (bash Calculator) In A Shell Script?

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