Defining a constant

ID: 8

See: DefineConstant 
				
					using uCalcSoftware;

var uc = new uCalc();
uc.DefineVariable("MyVar = 10");
uc.DefineConstant("MyPi = 3.14");

Console.WriteLine(uc.Eval("MyVar"));
Console.WriteLine(uc.Eval("MyPi"));

uc.EvalStr("MyVar = 20"); // Attempt to change MyVar
Console.WriteLine(uc.Error.Message);

uc.EvalStr("MyPi = 25"); // Attempt to change MyPi
Console.WriteLine(uc.Error.Message);

Console.WriteLine(uc.EvalStr("MyVar"));
Console.WriteLine(uc.EvalStr("MyPi"));
				
			
10
3.14
No error
Value cannot be assigned here
20
3.14
Explore 600+ other examples
				
					#include <iostream>
#include "uCalc.h"

using namespace std;
using namespace uCalcSoftware;

int main() {
   uCalc uc;
   uc.DefineVariable("MyVar = 10");
   uc.DefineConstant("MyPi = 3.14");

   cout << uc.Eval("MyVar") << endl;
   cout << uc.Eval("MyPi") << endl;

   uc.EvalStr("MyVar = 20"); // Attempt to change MyVar
   cout << uc.Error().Message() << endl;

   uc.EvalStr("MyPi = 25"); // Attempt to change MyPi
   cout << uc.Error().Message() << endl;

   cout << uc.EvalStr("MyVar") << endl;
   cout << uc.EvalStr("MyPi") << endl;
}
				
			
10
3.14
No error
Value cannot be assigned here
20
3.14
Explore 600+ other examples
				
					Imports System
Imports uCalcSoftware
Public Module Program
   Public Sub Main()
      Dim uc As New uCalc()
      uc.DefineVariable("MyVar = 10")
      uc.DefineConstant("MyPi = 3.14")
      
      Console.WriteLine(uc.Eval("MyVar"))
      Console.WriteLine(uc.Eval("MyPi"))
      
      uc.EvalStr("MyVar = 20") '// Attempt to change MyVar
      Console.WriteLine(uc.Error.Message)
      
      uc.EvalStr("MyPi = 25") '// Attempt to change MyPi
      Console.WriteLine(uc.Error.Message)
      
      Console.WriteLine(uc.EvalStr("MyVar"))
      Console.WriteLine(uc.EvalStr("MyPi"))
   End Sub
End Module
				
			
10
3.14
No error
Value cannot be assigned here
20
3.14
Explore 600+ other examples