plus [+]

The only CLI calculator you'll ever need

NOTE: This is a fun side project I work on to learn rust. There are much better CLI calculators than this 🤷‍♂️

Lots of additions to a basic lalrpop calculator parser including:

• Negative numbers 😱
• Variables 👩‍💻
• Trig functions 🌊
• Logarithms 🪵
• Absolute values 🧮
• Command history 📚
• Basic floating point rounding 👩‍🏫
• Exponents 📌
• Square, Cube roots 📦
• Pre-defined constants [pi,e] 🥧
• Ans variable, holds the answer to the previous operation 📝

And many more quality of life features

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Installation 🧮

Download prebuilt binaries in the 'releases' tab on the right You can also add plus to the PATH for easy access

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Docs 📖

Ill add some basic documentation of some of plus's functionality here. Most people wont even need to read this to user plus, it is very straight forward!

Basic operations

plus's syntax is very similar to anything you would enter into a normal calculator(apart from a few special cases), so equtions like

plus> 5+5
10
plus> 13*3
39
plus> (16/4)^3
64

all work as intended. Note here that the parser will ignore whitespace, so you could also type

plus> ( 16  /4) ^  3
64

Also, check this out 👀

plus> 0.1 + 0.2
0.3

Variables

Define variables with =

plus> x = 32
32
plus> y = 45/9
5
plus> z = x / y
6.4

then use it like this

plus> 3y / 2
7.5
plus> 5 * z
32
plus> 5(z)
32
plus> 5z
32

multiplication syntax is pretty robust, as seen in the last 3 lines

Trig functions

plus (currently) includes 6 trig functions, sin(), cos(), tan(), and csc(), sec(), cot().

note the constant pi

plus> sin(2pi)
0
plus> cos(32)
0.8342233605
plus> tan(180)
1.3386902104
plus> pi
3.1415926536

Roots

plus has a couple roots functions for calculating square and cube roots. Arbitrary roots are planned(See TODO) Both √ and sqrt() can be used

plus> √25
5
plus> sqrt(100)
10
plus> (3)√125
5
plus> cbrt(1000)
10

Logarithms

calculate logarithms using the log() keyword. There are also functions for natural logs ln(). Calculate arbitrary logs using log x ()

note the predefined e constant

plus> log(100)
2
plus> ln(e)
1
plus> log 5 (25)
2

Ans

use ans to access the output of the last command

plus> 108 * 34
3672
plus> ans / 2
1836
plus> ans-1800
36
plus> ans / 6
6