CalCLI - a CLI calculator

An overengineered (because it's fun) cross-platform CLI calculator app with a rich set of features.

It is handy if you need to do some quick calculations while hacking in the terminal - no need to open a calculator app of any kind.

The flow of the app is as follows:

Table of contents

• Installation
  • Prerequisites
  • Manual
  • MacOS
  • Linux
    • via APT
      • Prerequisites
      • Installation
    • via YUM
      • Prerequisites
      • Installation
• Usage
• Features

Installation

Prerequisites

• Go (version 1.22 or higher) if you want to build the app from the source code.

Manual

Download the latest release for your OS from GitHub.

MacOS

• via Homebrew:

brew tap n0rdy/n0rdy
brew install calcli

Linux

via APT

Prerequisites

To enable, add the following file /etc/apt/sources.list.d/fury.list:

deb [trusted=yes] https://apt.fury.io/n0rdy/ /

You can do this either manually or by running the following command:

echo "deb [trusted=yes] https://apt.fury.io/n0rdy/ /" > /etc/apt/sources.list.d/fury.list

If you experienced this error:

bash: /etc/apt/sources.list.d/fury.list: Permission denied

try to do the following:

sudo -i
# enter your password
echo "deb [trusted=yes] https://apt.fury.io/n0rdy/ /" > /etc/apt/sources.list.d/fury.list
# click Ctrl+D to exit

Installation

sudo apt update && sudo apt install calcli

via YUM

Prerequisites

To enable, add the following file /etc/yum.repos.d/fury.repo:

[fury]
name=Gemfury n0rdy Private Repo
baseurl=https://yum.fury.io/n0rdy/
enabled=1
gpgcheck=0

Installation

sudo yum install calcli

Usage

calcli

This will start the app in the interactive mode. Type your expression and press Enter to get the result.

Press Ctrl+C or Esc to exit the app.

Check the bottom of the screen for the help message with the list of available commands and hotkeys.

Features

• basic arithmetic operations: +, -, *, /, %, ^, !, as well as parentheses
• integer and floating-point numbers (. as a decimal separator)
• a set of predefined constants: pi, e
• math functions:
  • abs(x) - the absolute value of x
  • acos(x) - the arccosine of x
  • asin(x) - the arcsine of x
  • atan(x) - the arctangent of x
  • ceil(x) - the smallest integer value greater than or equal to x
  • cos(x) - the cosine of x
  • exp(x) - the value of e^x
  • exp2(x) - the value of 2^x
  • floor(x) - the largest integer value less than or equal to x
  • ln(x) - the natural logarithm of x
  • log(x, base) - the logarithm of x to the specified base
  • log2(x) - the base-2 logarithm of x
  • log10(x) - the base-10 logarithm of x
  • mod(x, y) - the remainder of the division of x by y
  • nrt(x, degree) - the root of x of the specified degree
  • percent(x, y) - the percentage of x from y
  • round(x) - the value of x rounded to the nearest integer
  • sin(x) - the sine of x
  • sqrt(x) - the square root of x
  • tan(x) - the tangent of x
• the result of the previous calculation is stored in the variable $pr and can be used in further calculations
• it is possible to persist the result of the calculation or a value in the variable and use it in further calculations $var = 5 + 5
• calling pmem() system function will print all the variables stored in memory
• review the history of calculations by pressing the Up and Down arrow keys, or switching to the history mode by typing :h and pressing Enter
• in history mode, press / to search for a specific expression in the history

Have fun! =)