A simple mathematical expression parser and evaluator for .NET. This repository contains calcex.core, the actual .NET parser library, the calcex .NET Core CLI and a sample Windows GUI.

Calcex.Core is a basic parser and evaluator library for mathematical expressions built on .NET Core. Some functionalities are:

• support for many common arithmetic and bitwise operators (*, ^, %, &, ...)

• support for many mathematical functions (sin, ln, log, min, ...)

• user-defined variables and functions

• evaluate to double, decimal or boolean values

• compile expressions into callable delegates

• convert expressions to postfix notation and MathML strings

Calcex.Console contains a simple command-line interface that provides easy access to the mathematical evaluators.

Calcex.Windows contains Calcex App, a basic GUI calculator app for Windows built using WPF.

Parser parser = new Parser();
// Set a custom variable
parser.SetVariable("x", -12);
// Parse
var tree = parser.Parse("2*pi+5-x");
// Evaluate to double
double doubleResult = tree.Evaluate();
// Evaluate to decimal
decimal decimalResult = tree.EvaluateDecimal(); 
// Compile to delegate
Func<double, double> func = tree.Compile("x");

Fore more, visit the Calcex wiki.

Calcex is published under BSD-3-Clause license.