// User stories for Group Project. 
 
// 1. I want a program that can take any number of integers and add them together
 
// 2. I want a program that can take any number of integers and calculate their mean (average). 
 
// 3. I want a program that can take any number of integers and find their median number. 
 
// HINT: The name of these "programs" should be: sum, mean, median. 

//---------------------

//PseudoCode

//1. make variable named "sum", take array of integers, produce sum of total.
//2. make variable name "mean", take array of integers, take sum of integers, divide by # of integers
//3. make variable named "median", IF even -> take array of integers, take # of intergers, divide by 2, call result, use result as position in original array to find median.
//If odd -> take array of integers, take # of intergers, divide by 2, call result, round up on result, use result as position in original array to find median.


//--------------------
//1.
function sum(collection) {
	total_sum = 0;
	for (var i = 0; i < collection.length; i++) {
	    total_sum += collection[i];
	}
	return total_sum;
}


//2.
function mean(collection) {
	total_sum = 0;
	for (var i = 0; i < collection.length; i++) {
	    total_sum += collection[i];
	}
	return total_sum / collection.length;
}

//3. 
function median(collection) {
	collection.sort();
	var tempNum = Math.round(collection.length / 2);
	if (collection.length % 2 !== 0) {
		return collection[tempNum - 1];
	} else {
		var average = (collection[tempNum] + collection[tempNum - 1]) / 2;
		return average;
	}
}