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Unity Engine

Evaluate<T>(string, out T)

Evaluates a math expression and returns the result.
Read time 1 minuteLast updated 4 days ago

Definition

  • Type: Method
  • Namespace: UnityEngine
  • Assembly: UnityEngine.CoreModule

Evaluate<T>(string, T)

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

Parameters

expression

string
A string containing a mathematical expression (e.g. "4+3").

value

T
The result of the expression evaluation. Supported types are: 
int
, 
float
, 
long
, 
double
.

Returns

Type

Description

boolIndicates whether expression could be evauated successfully.

Remarks

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.

Examples

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);    }}