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Five Commands To Use Calculator In Linux Command Line?
As a Linux administrator you may use the command line calculator many times in a day for some purpose.
I had used this especially when LVM creation using the PE values.
There are many commands available for this purpose and i’m going to list most used commands in this article.
These command line calculators are allow us to perform all kind of actions such as scientific, financial, or even simple calculation.
Also, we can use these commands in shell scripts for complex math.
In this article, I’m listing the top five command line calculator commands.
Those command line calculator commands are below.
bc:An arbitrary precision calculator languagecalc:arbitrary precision calculatorexpr:evaluate expressionsgcalccmd:gnome-calculator – a desktop calculatorqalc:Linux Shell:
How To Perform Calculation In Linux Using bc Command?
bs stands for Basic Calculator. bc is a language that supports arbitrary precision numbers with interactive execution of statements. There are some similarities in the syntax to the C programming language.
A standard math library is available by command line option. If requested, the math library is defined before processing any files. bc starts by processing code from all the files listed on the command line in the order listed.
After all files have been processed, bc reads from the standard input. All code is executed as it is read.
By default bc command has installed in all the Linux system. If not, use the following procedure to install it.
For Fedora system, use DNF Command to install bc.
$ sudo dnf install bc
For Debian/Ubuntu systems, use APT-GET Command or APT Command to install bc.
$ sudo apt install bc
For Arch Linux based systems, use Pacman Command to install bc.
$ sudo pacman -S bc
For RHEL/CentOS systems, use YUM Command to install bc.
$ sudo yum install bc
For openSUSE Leap system, use Zypper Command to install bc.
$ sudo zypper install bc
How To Use The bc Command To Perform Calculation In Linux?
We can use the bc command to perform all kind of calculation right from the terminal.
$ bc
bc 1.07.1
Copyright 1991-1994, 1997, 1998, 2000, 2004, 2006, 2008, 2012-2017 Free Software Foundation, Inc.
This is free software with ABSOLUTELY NO WARRANTY.
For details type `warranty'.
1+2
3
10-5
5
2*5
10
10/2
5
(2+4)*5-5
25
quit
Use -l flag to define the standard math library.
$ bc -l
bc 1.07.1
Copyright 1991-1994, 1997, 1998, 2000, 2004, 2006, 2008, 2012-2017 Free Software Foundation, Inc.
This is free software with ABSOLUTELY NO WARRANTY.
For details type `warranty'.
3/5
.60000000000000000000
quit
How To Perform Calculation In Linux Using calc Command?
calc is an arbitrary precision calculator. It’s a simple calculator that allow us to perform all kind of calculation in Linux command line.
For Fedora system, use DNF Command to install calc.
$ sudo dnf install calc
For Debian/Ubuntu systems, use APT-GET Command or APT Command to install calc.
$ sudo apt install calc
For Arch Linux based systems, use Pacman Command to install calc.
$ sudo pacman -S calc
For RHEL/CentOS systems, use YUM Command to install calc.
$ sudo yum install calc
For openSUSE Leap system, use Zypper Command to install calc.
$ sudo zypper install calc
How To Use The calc Command To Perform Calculation In Linux?
We can use the calc command to perform all kind of calculation right from the terminal.
Intractive mode
$ calc
C-style arbitrary precision calculator (version 2.12.7.1)
Calc is open software. For license details type: help copyright
[Type "exit" to exit, or "help" for help.]
; 5+1
6
; 5-1
4
; 5*2
10
; 10/2
5
; quit
Non-Intractive mode
$ calc 3/5
0.6
How To Perform Calculation In Linux Using expr Command?
Print the value of EXPRESSION to standard output. A blank line below separates increasing precedence groups. It’s part of coreutils so, we no need to install it.
How To Use The expr Command To Perform Calculation In Linux?
Use the following format for basic calculations.
For addition
$ expr 5 + 1
6
For subtraction
$ expr 5 - 1
4
For division.
$ expr 10 / 2
5
How To Perform Calculation In Linux Using gcalccmd Command?
gnome-calculator is the official calculator of the GNOME desktop environment. gcalccmd is the console version of Gnome Calculator utility. By default it has installed in the GNOME desktop.
How To Use The gcalccmd Command To Perform Calculation In Linux?
I have added few examples on this.
$ gcalccmd
> 5+1
6
> 5-1
4
> 5*2
10
> 10/2
5
> sqrt(16)
4
> 3/5
0.6
> quit
How To Perform Calculation In Linux Using qalc Command?
Qalculate is a multi-purpose cross-platform desktop calculator. It is simple to use but provides power and versatility normally reserved for complicated math packages, as well as useful tools for everyday needs (such as currency conversion and percent calculation).
Features include a large library of customizable functions, unit calculations and conversion, symbolic calculations (including integrals and equations), arbitrary precision, uncertainty propagation, interval arithmetic, plotting, and a user-friendly interface (GTK+ and CLI).
For Fedora system, use DNF Command to install qalc.
$ sudo dnf install libqalculate
For Debian/Ubuntu systems, use APT-GET Command or APT Command to install qalc.
$ sudo apt install libqalculate
For Arch Linux based systems, use Pacman Command to install qalc.
$ sudo pacman -S libqalculate
For RHEL/CentOS systems, use YUM Command to install qalc.
$ sudo yum install libqalculate
For openSUSE Leap system, use Zypper Command to install qalc.
$ sudo zypper install libqalculate
How To Use The qalc Command To Perform Calculation In Linux?
I have added few examples on this.
$ qalc
> 5+1
5 + 1 = 6
> ans*2
ans * 2 = 12
> ans-2
ans - 2 = 10
> 1 USD to INR
It has been 36 day(s) since the exchange rates last were updated.
Do you wish to update the exchange rates now? y
error: Failed to download exchange rates from coinbase.com: Resolving timed out after 15000 milliseconds.
1 * dollar = approx. INR 69.638581
> 10 USD to INR
10 * dollar = approx. INR 696.38581
> quit
How To Perform Calculation In Linux Using Linux Shell Command?
We can use the shell commands such as echo, awk, etc to perform the calculation.
For Addition using echo command.
$ echo $((5+5))
10
via: https://www.2daygeek.com/linux-command-line-calculator-bc-calc-qalc-gcalccmd/
作者：Magesh Maruthamuthu 选题：lujun9972 译者：译者ID 校对：校对者ID