Array Iteration Lab

Indexed iteration is similar to many other programming languages.

let coll, sum;

coll = [10, 20, 30, 40];
sum = 0;
for (let i=0; i<coll.length; i++) {
	sum += coll[i];
}
prn("sum: " + sum);

Here is an enhanced (simpler) iteration approach when the index is not needed

let coll, sum;

coll = [10, 20, 30, 40];
sum = 0;
for (let eachElement of coll) {
	sum += eachElement;
}
prn("sum: " + sum);

Functional programming provides us with this option.

let coll, sum;

coll = [10, 20, 30, 40];
sum = 0;
coll.forEach(eachElement => sum += eachElement);
prn("sum: " + sum);