YouTipC Function Malloc
# C Library Function - malloc()
[ C Standard Library - ](#)
## Description
The C library function **void *malloc(size_t size)** allocates the requested memory and returns a pointer to it.
## Declaration
Below is the declaration for the malloc() function.
void *malloc(size_t size)
## Parameters
* **size** -- This is the size of the memory block, in bytes.
## Return Value
This function returns a pointer to the allocated memory, or NULL if the request fails.
## Example
The following example demonstrates the usage of the malloc() function.
## Example
#include#include#includeint main(){char *str; /* Initial memory allocation */str = (char *)malloc(15); strcpy(str, "tutorial"); printf("String = %s, Address = %un", str, str); /* Reallocating memory */str = (char *)realloc(str, 25); strcat(str, ".com"); printf("String = %s, Address = %un", str, str); free(str); return(0); }
Let us compile and run the above program, this will produce the following result:
String = tutorial, Address = 3662685808String = , Address = 3662685808
[ C Standard Library - ](#)