In C language, the malloc function is used to dynamically allocate memory.

The malloc() function represents memory allocation and dynamically allocates a piece of memory.

It reserves a memory space of the specified size and returns a null pointer to the memory location.

malloc() function carries garbage values. The returned pointer is of type void.

The syntax of the malloc() function is as follows -

ptr = (castType*) malloc(size);

Example

The following example shows the usage of the malloc() function.

Live demonstration

#include<stdio.h>
#include<string.h>
#include<stdlib.h>
int main(){
   char *MemoryAlloc;
   /* memory allocated dynamically */
   MemoryAlloc = malloc( 15 * sizeof(char) );
   if(MemoryAlloc== NULL ){
      printf("Couldn&#39;t able to allocate requested memory</p><p>");
   }else{
      strcpy( MemoryAlloc,"TutorialsPoint");
   }
   printf("Dynamically allocated memory content : %s</p><p>", MemoryAlloc);
   free(MemoryAlloc);
}

Output

When the above program is executed, the following results will be produced -

Dynamically allocated memory content: TutorialsPoint

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