# isgraph() function in C

## Using the `isgraph()` function in C

The `isgraph()` function in C is used to check whether a character is a graphical character. The function takes a character as input and returns a non-zero value if the character is a graphical character, or zero if the character is not a graphical character.

A graphical character is a character that can be displayed on a screen. Some examples of graphical characters are:

* Letters (a-z, A-Z)
    
* Numbers (0-9)
    
* Punctuation characters (see above)
    
* Symbols (such as @, #, $, %, etc.)
    

Here is an example of how to use the `isgraph()` function:

```c
#include <stdio.h>
#include <stdint.h>
#include <ctype.h>

int32_t main(int32_t argc, char const *argv[])
{
    char c = 'a';

    int32_t result = isgraph(c);

    if (result > 0x00)
    {
        printf("The character '%c' is a graphical character.\n", c);
    }
    else
    {
        printf("The character '%c' is not a graphical character.\n", c);
    }

    return 0;
}
```

The `isgraph()` function takes a character as input and returns a non-zero value if the character is a graphical character, or zero if the character is not a graphical character. In this example, the character `'a'` is a graphical character, so the function will return a non-zero value and the `printf()` statement will print the output.

Explore the complete list of functions available in [ctype header in C standard library](https://syntaxspace.com/c-library-ctype_h-functions).