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#170 – The else Portion of an if Statement
An if statement can optionally include an else keyword and block of statements, which will execute if the boolean expression for the if statement evaluates to false. if (age >= 50) {...
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#172 – Nested if Statements
The statement to be executed when an if statement’s boolean expression resolves to true can be another if statement. if (bob.IsSingle) if (TheGameIsOnToday()) WatchGame(); else PlayVideoGames();...
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#480 – Pre-Processing Directives
Pre-processing directives are elements that you can include in your source code that are not part of the source code itself. Instead, they instruct the C# compiler to perform some particular action,...
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#499 – Conditional Compilation Symbols Are Defined or Undefined
At any given point in your source code, while the compiler is compiling that section of code, a particular conditional compilation symbol is either defined or undefined. You define a conditional...
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#503 – Conditionally Compile Code Using #if / #endif Directives
Once you define a conditional compilation symbol using the #define directive, you can use the #if directive to conditionally compile code when the corresponding conditional compilation symbol is...
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#504 – Using the #else Directive
You can conditionally compile code using the #if and #endif preprocessor directive. You can also use an #else clause between the #if and the #endif. In the code below, we’ve commented out the...
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#505 – Using the #elif Directive
When you check whether a conditional compilation symbol is defined using the #if, #else and #endif directives, you can include additional clauses within the scope of the #if directive by using the...
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#506 – Using Expressions in #if and #elif Directives
You can use more complex expressions in #if and #elif directives, instead of just checking to see whether a single conditional compilation symbol is defined. In the example below, the #elif directive...
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#507 – You can #define Other Symbols within a #if Block
Within the body of an #if/#endif pair, you can include #define or #undef directives. If the body of the #if does contain #define or #undef directives, it must appear before the first token of the...
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#1,126 – Rewriting a Loop to Avoid continue Statement
The continue statement allows jumping to end of the body of a loop, skipping the rest of the code within the loop. Either the next iteration of the loop executes, or the code following the loop...
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