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A collection of pure POSIX `sh` alternatives to external processes
**NOTE**: If anything seen here is **not** POSIX `sh`, open an issue. This is a living document that is open to change and improvement.
## Table of Contents
<!-- vim-markdown-toc GFM -->
@ -35,6 +38,12 @@ A collection of pure POSIX `sh` alternatives to external processes
* [File Conditionals](#file-conditionals)
* [Variable Conditionals](#variable-conditionals)
* [Variable Comparisons](#variable-comparisons)
* [ARITHMETIC OPERATORS](#arithmetic-operators)
* [Assignment](#assignment)
* [Arithmetic](#arithmetic)
* [Bitwise](#bitwise)
* [Logical](#logical)
* [Miscellaneous](#miscellaneous)
<!-- vim-markdown-toc -->
@ -442,3 +451,58 @@ For use in `[ ]` `if [ ]; then` and `test`.
| `var -lt var2` | Less than (*algebraically*).
| `var -le var2` | Less than or equal to (*algebraically*).
# ARITHMETIC OPERATORS
## Assignment
| Operators | What does it do? |
| --------- | ---------------- |
| `=` | Initialize or change the value of a variable.
## Arithmetic
| Operators | What does it do? |
| --------- | ---------------- |
| `+` | Addition
| `-` | Subtraction
| `*` | Multiplication
| `/` | Division
| `**` | Exponentiation
| `%` | Modulo
| `+=` | Plus-Equal (*Increment a variable.*)
| `-=` | Minus-Equal (*Decrement a variable.*)
| `*=` | Times-Equal (*Multiply a variable.*)
| `/=` | Slash-Equal (*Divide a variable.*)
| `%=` | Mod-Equal (*Remainder of dividing a variable.*)
## Bitwise
| Operators | What does it do? |
| --------- | ---------------- |
| `<<` | Bitwise Left Shift
| `<<=` | Left-Shift-Equal
| `>>` | Bitwise Right Shift
| `>>=` | Right-Shift-Equal
| `&` | Bitwise AND
| `&=` | Bitwise AND-Equal
| `\|` | Bitwise OR
| `\|=` | Bitwise OR-Equal
| `~` | Bitwise NOT
| `^` | Bitwise XOR
| `^=` | Bitwise XOR-Equal
## Logical
| Operators | What does it do? |
| --------- | ---------------- |
| `!` | NOT
| `&&` | AND
| `\|\|` | OR
## Miscellaneous
| Operators | What does it do? | Example |
| --------- | ---------------- | ------- |
| `,` | Comma Separator | `((a=1,b=2,c=3))`