>Could someone educate me as to why it is standard practice to define constants with a variable name
>rather than to just use the constant in the code?
>
>IE, why is:
>

>#define MY_CONSTANT "My constant"
>? MY_CONSTANT
>

>better than
>

>? "My constant"
>

>
>I understand that it may make it easier to change the value of the constant if the need arises during
>design, but if the constant is only used in one place in the application is there still an advantage?

How about this:

#define AVOGADRO 6.0221415 × 10^23