What does void mean in c language?

void means null or no value in C language. It is mainly used to specify that the function has no return value or represents the null value of the pointer. The latter can store general pointer values, such as function pointers or callback functions.

The meaning of void in C language

void means empty or no value in C language, it has Two main uses:

1. Specify that the function has no return value

If the function does not return any value after execution, its return type can be specified as void. For example:

<code class="c">void print_hello() {
  printf("Hello, world!\n");
}</code>

2. Represents the null value of a pointer

is similar to other pointer types such as int, void can point to any type of variable. However, unlike other pointers, void* pointers cannot be dereferenced to obtain the value pointed to by a variable and can only be used to store general pointer values, such as function pointers or callback functions. For example:

<code class="c">void* ptr;
ptr = malloc(sizeof(int));</code>

In this example, ptr points to an allocated memory block, but it does not know the type stored in that memory block.

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