while

console.log('A');
console.log('B');

var i = 0;
while (i < 10) {
	console.log('Hello');
	i = i + 1;
}
var number = [1, 2, 3, 4, 5];
var i = 0;
var total = 0;
while (i < number.length) {
	total = total + number[i];
	i = i + 1;
}
console.log(`total: ${total}`);