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Conditional Methods
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One of, if not the most important concepts in software programming is that
of Conditional Methods. Conditional methods provide a program with the
ability to make decisions based on user input, user selections or data values.
The code below is a simple example of a conditional method:
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public static void Main(string[] args)
{
Console.Write("Please enter any value: ");
string enteredValue = Console.ReadLine();
if (enteredValue.Length > 0)
{
Console.WriteLine("You entered: {0}", enteredValue);
}
else
{
Console.WriteLine("You didn't enter any value.");
}
Console.ReadLine();
}
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When run, it opens a console and requests the user to enter a value.
It then checks to see if something was entered. Here is the condition...
IF there was a value entered, display it ELSE notify the user that nothing
was entered. In a more sophisticated software program the question or
condition could be more complicated. Perhaps something like this:
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public static void Main(string[] args)
{
//add some logic to access a database to confirm you have
//ample funds change the value to TRUE if we want to deliver
//the dinero
bool amountApproved = false;
Console.Write("Please enter amount to withdraw: ");
string enteredValue = Console.ReadLine();
if (enteredValue.Length > 0 && amountApproved)
{
Console.WriteLine(
"The amount entered: {0}, will be dispersed.",
enteredValue);
}
else
{
Console.WriteLine(
"Sorry, the amount {0} exceeds your " +
"available credit.",
enteredValue);
}
Console.ReadLine();
}
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Although this is a basic concept, it needs to be understood, utilized and
mastered before moving to more complex concepts.
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The sample code on this website is provided to illustrate a concept and should not be used in
applications or Web sites without proper professional consultation, as it may not illustrate
the safest coding practices. I assume no liability for incidental or consequential damages
should the sample code be used for purposes other than as intended.
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