Hi, is there a difference between declaring a var at the beginning of an action, compared to declaring a var within the actions loop?

action super_thing()
{

var Boop; //declared before the loop

while(1)
{
...
Boop+=1*time_step;
}

}

____________Compared to this:

action super_thing()
{


while(1)
{
var Boop; //declared before the loop

Boop+=1*time_step;

}

}