using uCalcSoftware;

var uc = new uCalc();
var MyVar = uc.DefineVariable("x = 100");
Console.WriteLine(uc.EvalStr("x"));

uc.EvalStr("x = 200");
Console.WriteLine(uc.EvalStr("x")); // x can change here

// Locking an item prevents it from being changed
MyVar.IsProperty(ItemIs.Locked, true);

uc.EvalStr("x = 300"); // x cannot change here
Console.WriteLine(uc.EvalStr("x")); // x retains the previous value