Ncalc Values

A value is a token representing an element that is evaluated. A value can be either of any of the following.

• Integer
• Floating
• DateTime
• Boolean
• String
• Scientific Notation

Integers

You can specify the integers using numbers and are evaluated as Int32.

public static void Example1()
{
    string expression = "139";
    Expression evaluator = new Expression(expression);
    var result = evaluator.Evaluate();
    Console.WriteLine("{0} ({1})", result, result.GetType());
}

Floating

Use the dot to define the decimal part.

You can specify the floating number by using the dot (.) to define the decimal part.

public static void Example2()
{
    string expression = "139.98";
    Expression evaluator = new Expression(expression);
    var result = evaluator.Evaluate();
    Console.WriteLine("{0} ({1})", result, result.GetType());
}

It is evaluated as Double.

DateTime

To specify and evaluate date time, we need to enclose the string containing date-time between hashtags (#).

• It is evaluated as a DateTime.
• By default, it uses the current Culture to evaluate.

public static void Example3()
{
    string expression = "#2012/07/29#";
    Expression evaluator = new Expression(expression);
    var result = evaluator.Evaluate();
    Console.WriteLine("{0} ({1})", result, result.GetType());
}

Booleans

You can use the true and false literals to evaluate as a Boolean.

public static void Example4()
{
    string expression = "true";
    Expression evaluator = new Expression(expression);
    var result = evaluator.Evaluate();
    Console.WriteLine("{0} ({1})", result, result.GetType());

    expression = "false";
    evaluator = new Expression(expression);
    result = evaluator.Evaluate();
    Console.WriteLine("{0} ({1})", result, result.GetType());
}

Strings

You can use the single quotes (') to evaluate a string.

public static void Example5()
{
    string expression = "'Hi, this is a string.'";
    Expression evaluator = new Expression(expression);
    var result = evaluator.Evaluate();
    Console.WriteLine("{0} ({1})", result, result.GetType());
}

Scientific Notation

To define the power of ten (10^), you can use the e.

public static void Example6()
{
    string expression = "2.11e3";
    Expression evaluator = new Expression(expression);
    var result = evaluator.Evaluate();
    Console.WriteLine("{0} ({1})", result, result.GetType());
}

It is also evaluated as a Double.