Version: 2022.3
  • C#


Suggest a change


Thank you for helping us improve the quality of Unity Documentation. Although we cannot accept all submissions, we do read each suggested change from our users and will make updates where applicable.


Submission failed

For some reason your suggested change could not be submitted. Please <a>try again</a> in a few minutes. And thank you for taking the time to help us improve the quality of Unity Documentation.




public static bool Evaluate(string expression, out T value);


expression A string containing a mathematical expression (e.g. "4+3").
value The result of the expression evaluation. Supported types are: int, float, long, double.


bool Indicates whether expression could be evauated successfully.


Evaluates a math expression and returns the result.

The expressions that can be evaluated support:

  • arithmetic operators a+b, a-b, a*b, a/b,
  • power (a^b) and modulo (a%b) operators,
  • parentheses,
  • math functions sqrt(a), floor(a), ceil(a), round(a),
  • trigonometic functions cos(a), sin(a), tan(a) (argument expressed in radians), and a constant pi.

If the expression can not be evaluated, the function returns false and the result value is set to zero.

using UnityEditor;
using UnityEngine;

public class ExampleScript : MonoBehaviour { [MenuItem("Example/Int Expression")] public static void IntExample() { ExpressionEvaluator.Evaluate("2+3", out int result); // prints 5 Debug.Log(result); }

[MenuItem("Example/Float Expression")] public static void FloatExample() { ExpressionEvaluator.Evaluate("sqrt(cos(pi/3))", out float result); // prints 0.7071068 Debug.Log(result); } }