Okay. Read through the examples and thought up of a situation I may run into. In my loop, after I defined my keys (as shown in the tutorial), if I decided to consider using "if" statements, and my approach is to say "if, at a point in time, I press and hold '4' on the keypad, then the if statement will follow through in my loop"
for example:
void loop()
{
char key = kpd.getKey();
if(key == ‘4’)
{
// My specific command
}
^^
Would this theoretically work until I release the '4' key?