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.

# Syntax
```
#endif
```

```
#if (expression)  
// given that expression is true, if is executed. 
//code  
#endif  
```
```
#if expression  
//if code  

// instead of else if, we use elif in this directive. 
#elif expression
//elif code  


#else  
//else code

#endif  
```
# Code
Let's look at a simple coding example:



#include <stdio.h>  
#define NUMBER -2 
int main() {
    
#if (NUMBER>0)  
printf("Value of Number greater than 0 is: %d",NUMBER);
#else
printf("Value of Number less than 0 is: %d",NUMBER);

// #endif is used to determine the end the if condition.
#endif         
 
    return 0;
}

What is the #endif directive in C?

The #endif directive in C marks the end of #if, #ifdef, or #ifndef preprocessing blocks.