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Welcome to the math-expressions wiki! This page will be a quick guide on the syntax required by the parser.

Usage

MathExpression.parse("1 + 1 - 3 + x").setVariable("x", 9).evaluate(); // output: 8

Syntax

Numbers

While floating-point notation is not supported, any real number is supported:

1. 1, 10, -1024
2. 0.2454, -3.04593, 9.3333

Please do note that numbers are still subject to floating-point inaccuracy.

Operators

Currently, these operators are supported (and executed in order of):

1. Power (^)
2. Multiply, divide (* & /)
3. Add, subtract (+ & -)

Parentheses

Opening parentheses are paired with the closest closing parentheses, where inner most parentheses are prioritized to match (basically how you would expect them to match in programming languages).

Functions & Variables

The program identifies variables as a token that contains characters that isn't a number or an operator. If the variable is followed by a (, the program will then attempt to call the function with that name instead (e.g. variable * (1) vs function(1)).