For loop in AS3.0

I hav 4 movieclip on the stage … instance name (myMc1, myMc2, myMc3, myMc4)

now i use for loop function in AS2.0 and i wrote

for (i:Number = 1; i<5; i++){
var myMc:MovieClip = this[“myMc”+i];


now i can do anything with “myMc”, no need to write number(1, 2,…).

but i have to write this code in AS3… so how can i wright.?