How do I use malloc in C?

How do I use malloc in C?

You can use malloc to allocate memory dynamically in C. The syntax is ptr = malloc(size); where size is the number of bytes you want to allocate.

What does malloc return if it fails?

If malloc fails to allocate memory, it returns a NULL pointer. It's important to check for this to avoid dereferencing a NULL pointer.

How do I free the memory allocated by malloc?

You can free the memory using the free(ptr); function, where ptr is the pointer returned by malloc.

Can I use malloc for arrays?

Yes, you can use malloc to allocate memory for arrays. For example, int *arr = malloc(n * sizeof(int)); allocates memory for an array of n integers.