What does endif mean in C?

In the C Programming Language, the #endif directive is used to define the following directives: #if, #ifdef , and #ifndef . Whenever the #endif directive is encountered in a program, it determines if the preprocessing of #if, #ifdef, or #ifndef has been completed successfully.

What is ifdef and endif?

ifdef means “if the following is defined” while ifndef means “if the following is not defined”. So: #define one 0 #ifdef one printf(“one is defined “); #endif #ifndef one printf(“one is not defined “); #endif. is equivalent to: printf(“one is defined “); since one is defined so the ifdef is true and the ifndef is false …

What does Ifndef mean in C?

In the C Programming Language, the #ifndef directive allows for conditional compilation. The preprocessor determines if the provided macro does not exist before including the subsequent code in the compilation process.

Where do you put the #endif?

The Endif statement (Eif) marks the end of the If statement and any statements based on the If condition. The Endif statement is only valid when used in combination with the If statement. To use the Endif statement: Select Process > Insert > End If.

What is ifdef and endif in C++?

#ifdef means if defined. If the symbol following #ifdef is defined, either using #define in prior source code or using a compiler command-line argument, the text up to the enclosing #endif is included by the preprocessor and therefore compiled. #if works similarly, but it evaluates the boolean expression following it.

What is the purpose of #ifndef and its associated #define and #endif?

#ifndef checks whether the given token has been #defined earlier in the file or in an included file; if not, it includes the code between it and the closing #else or, if no #else is present, #endif statement.

What is the purpose of Ifdef?

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.

Why do we need Ifndef?

#ifndef and #define are known as header guards. Their primary purpose is to prevent C++ header files from being included multiple times.

Does python have an endif?

Yes. Python uses indentation to mark blocks. Both the if and the for end there. It means “power”, or what in some languages is ^ (Python uses that for bitwise xor).

What is php endif?

The endif keyword is used to mark the end of an if conditional which was started with the if(…): syntax. It also applies to any variation of the if conditional, such as if… elseif and if…else .

What is the difference between Ifdef and Ifndef?

Use the #ifdef statement when you want to compile a section only if a specified expression has been defined with #define. Use #ifndef when you want to compile a section only if a specified expression has not been defined.