Coin Flip Fun: Longest streak of heads

var NUM_FLIPS = 100;
var NUM_NUM_FLIPS = 30;
var heads = 0;
var tails = 0;
flipCoins();
// This function should flip a coin NUM_FLIPS
// times, and add the result to an array. We
// return the result to the caller.
function flipCoins(){
	var flips = [];
	var topstreak = 0;
	var curstreak = 0;
	for(var i = 0; i < NUM_FLIPS; i++){
		if(Randomizer.nextBoolean()){
			flips.push("Heads");
			heads++;
			curstreak++;
		}else{
			flips.push("Tails");
			tails++;
			if(curstreak > topstreak){
			    topstreak = curstreak;
			}
			curstreak = 0;
		}
	}
	printArray(flips);
    longestHeadsStreak(topstreak);

	return topstreak;
}

function printArray(arr){
	for(var i = 0; i < arr.length; i++){
		println(i+1 + ": " + arr[i]);
	}
}
function longestHeadsStreak(topstreak){
    print("Longest Streak of Heads: " + topstreak);
}