What is void in c++

void in C represents empty type data and is used for functions that do not return any value and functions that do not accept any parameters. It can also be used as a pointer type, which can point to any type of data. The void type represents a null value, does not return any value, and is not compatible with other types.

void in C

In C, void is a data type that represents a void type. It is usually used to represent a function that does not return any value.

Uses

void mainly has the following uses:

• Function declaration: declare a function that does not return any value When using void as the return value type. For example:

<code class="cpp">void print_hello();</code>

• Function parameters: When the function does not accept any parameters, you can use void in the parameter list. For example:

<code class="cpp">void do_something();</code>

• Pointer type: void* can be used to point to any type of data. This is common with dynamic memory allocation because it allows pointing to objects of different types.

Semantics

• The void type represents a null value.
• void pointers can point to any type of object, including functions.
• void function does not return any value.
• void variables cannot be used or assigned directly.

Relationships with other types

void has no compatibility or derived relationships with other types. It is a unique type that represents null value.

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