C malloc()
The name "malloc" stands for memory allocation.

The malloc() function reserves a block of memory of the specified number of bytes. And, it returns a pointer of void which can be casted into pointers of any form.

Syntax of malloc()
ptr = (castType*) malloc(size);

C free()
Dynamically allocated memory created with either calloc() or malloc() doesn't get freed on their own. You must explicitly use free() to release the space.

Syntax of free()
free(ptr);

Program to calculate the sum of n numbers entered by the user (Using malloc() and free())

Mixed-up sentence exercise