Can you use else for Ifdef?

4 The #else Directive. This directive delimits alternative source text to be compiled if the condition tested for in the corresponding #if , #ifdef , or #ifndef directive is false. An #else directive is optional.

What does endif mean?

endif (plural endifs) (computing) A directive, in several programming languages, that marks the end of an if statement, especially one containing multiple if then else statements.

What is the use of Ifdef in Verilog?

The keyword `ifndef simply tells the compiler to include the piece of code until the next `else or `endif if the given macro called FLAG is not defined using a `define directive.

How does Ifdef work in C?

In the C Programming Language, the #ifdef directive allows for conditional compilation. The preprocessor determines if the provided macro exists before including the subsequent code in the compilation process.

What is a compiler directive like include and Ifdef?

You can use the `undef compiler directive to undefine a text macro that you use in more than one file. `ifdef. Optionally includes lines of source code during compilation. The `ifdef directive checks that a macro has been defined, and if so, compiles the code that follows.

What is the difference between else if and if else?

So as the default case handles all possibilities the idea behind else if is to split this whole rest into smaller pieces. The difference between else and else if is that else doesn’t need a condition as it is the default for everything where as else if is still an if so it needs a condition.

What is Ifdef in System Verilog?

The keyword `ifdef simply tells the compiler to include the piece of code until the next `else or `endif if the given macro called FLAG is defined using a `define directive.

What is the purpose of ELSE IF?

Use the else if statement to specify a new condition if the first condition is false .

What is the point of ELSE IF?

The if/else if statement allows you to create a chain of if statements. The if statements are evaluated in order until one of the if expressions is true or the end of the if/else if chain is reached. If the end of the if/else if chain is reached without a true expression, no code blocks are executed.