# ExecuteMethod

Applies to:Fast Math Parser
Class:uCalc.ParsedExpr
Rapidly executes code that was parsed with Parse or passed By Expression for which a result is not required
Syntax
Execute()
Remarks
This can be used in cases where the reutrn value is not needed, such as statements that represent code to be executed rather than a math expression.

Example 1: Performing a summation; a return value is needed only at the very end
``` Dim VariableX = uc.DefineVariable("x") Dim Total = uc.DefineVariable("Total") Dim Expression As string Console.Write("Enter an expression (Ex: Total = Total + x^2 + 5): ") Expression = Console.ReadLine() Dim ParsedExpr = uc.Parse(Expression) Dim x As double for x = 1 To 10 VariableX.SetVariableValue(x) ParsedExpr.Execute() Console.WriteLine(uc.Eval("x") + " Sub total = " + uc.Eval("Total")) Next ' Output ' 1 Sub total = 6 ' 2 Sub total = 15 ' 3 Sub total = 29 ' 4 Sub total = 50 ' 5 Sub total = 80 ' 6 Sub total = 121 ' 7 Sub total = 175 ' 8 Sub total = 244 ' 9 Sub total = 330 ' 10 Sub total = 435 ```
``` var VariableX = uc.DefineVariable("x"); var Total = uc.DefineVariable("Total"); string Expression; Console.Write("Enter an expression (Ex: Total = Total + x^2 + 5): "); Expression = Console.ReadLine(); var ParsedExpr = uc.Parse(Expression); for (double x = 1; x <= 10; x = x + 1) { VariableX.SetVariableValue(x); ParsedExpr.Execute(); Console.WriteLine(uc.Eval("x") + " Sub total = " + uc.Eval("Total")); } // Output // 1 Sub total = 6 // 2 Sub total = 15 // 3 Sub total = 29 // 4 Sub total = 50 // 5 Sub total = 80 // 6 Sub total = 121 // 7 Sub total = 175 // 8 Sub total = 244 // 9 Sub total = 330 // 10 Sub total = 435 Console.WriteLine("Total = " + uc.Eval("Total")); // Returns "Total = 435"; ParsedExpr.Release(); VariableX.Release(); ```
``` //var VariableX = uc.DefineVariable('x'); //var Total = uc.DefineVariable('Total'); Write('Enter an expression (Ex: Total = Total + x^2 + 5): ') Expression = ReadLn(); //var ParsedExpr = uc.Parse(Expression); for x := 1 to 10 do begin VariableX.SetVariableValue(x); ParsedExpr.Execute(); WriteLn(uc.Eval('x') + ' Sub total = ' + uc.Eval('Total')); End; // Output // 1 Sub total = 6 // 2 Sub total = 15 // 3 Sub total = 29 // 4 Sub total = 50 // 5 Sub total = 80 // 6 Sub total = 121 // 7 Sub total = 175 // 8 Sub total = 244 // 9 Sub total = 330 // 10 Sub total = 435 ```
``` auto VariableX = uc.DefineVariable("x"); auto Total = uc.DefineVariable("Total"); string Expression; cout << "Enter an expression (Ex: Total = Total + x^2 + 5): " << endl; cin >> Expression; // Ex: Total = Total + x^2 + 5 auto ParsedExpr = uc.Parse(Expression); for (double x = 1; x <= 10; x = x + 1) { VariableX.SetVariableValue(x); ParsedExpr.Execute(); cout << uc.Eval("x") << " Sub total = " << uc.Eval("Total") << endl; } // Output // 1 Sub total = 6 // 2 Sub total = 15 // 3 Sub total = 29 // 4 Sub total = 50 // 5 Sub total = 80 // 6 Sub total = 121 // 7 Sub total = 175 // 8 Sub total = 244 // 9 Sub total = 330 // 10 Sub total = 435 cout << "Total = " << uc.Eval("Total") << endl; // Returns "Total = 435"; ParsedExpr.Release(); VariableX.Release(); ```
``` auto VariableX = uc.DefineVariable("x"); auto Total = uc.DefineVariable("Total"); string ^ Expression; Console::Write("Enter an expression (Ex: Total = Total + x^2 + 5): "); Expression = Console::ReadLine(); auto ParsedExpr = uc.Parse(Expression); for (double x = 1; x <= 10; x = x + 1) { VariableX.SetVariableValue(x); ParsedExpr.Execute(); Console::WriteLine(uc.Eval("x") + " Sub total = " + uc.Eval("Total")); } // Output // 1 Sub total = 6 // 2 Sub total = 15 // 3 Sub total = 29 // 4 Sub total = 50 // 5 Sub total = 80 // 6 Sub total = 121 // 7 Sub total = 175 // 8 Sub total = 244 // 9 Sub total = 330 // 10 Sub total = 435 Console::WriteLine("Total = " + uc.Eval("Total")); // Returns "Total = 435"; ParsedExpr.Release(); VariableX.Release(); ```
DLL import code
``` <DllImport(uCalcDLL, CharSet:=CharSet.Ansi, CallingConvention:=CallingConvention.Cdecl, EntryPoint:="Execute")> _ Private Sub Execute__(ByVal ExprHandle As IntPtr) End Sub ```
``` [DllImport(uCalcDLL, CharSet=CharSet.Ansi, CallingConvention=CallingConvention.Cdecl, EntryPoint="Execute")] protected static extern void Execute_(IntPtr ExprHandle); ```
``` {DLLImport}procedure Execute__(ExprHandle: System.Pointer); cdecl; external uCalcDLL name 'Execute'; ```
``` typedef void (* __Execute)(void *ExprHandle); ```
``` [DllImport(uCalcLib, CharSet=CharSet::Ansi, CallingConvention=CallingConvention::Cdecl, EntryPoint = "Execute")] static void Execute_(void * ExprHandle); ```