A few lessons so far dealt with conditional processing, displaying a result when a condition is true, and another when it is false. When working with conditional processing, it is important to understand the representation of true and false values in C#.
C# checks by default a conditional statement if it returns a true value. Many inexperienced programmers write their test conditions as follows:
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if (expression != false)
// check if the expression is not false
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or like this:
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if (expression == true)
// check if the expression is true
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Since the program checks the default value as being true, you can write you test conditions by simply placing the condition in parenthesis:
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if (expression)
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When the expression is evaluated as a value different than false, C# executes the instructions that follows immediately after the condition. When it is evaluated as false, C# will simply ignore the instructions that follow after the condition.
The concepts explained in this lesson are also shown visually as part of the following video:
