function testCycle(n) {
var x = '';
var y = 0;
for (var i = 1; i <= n; i++) {
y += (2 * i - 1);
x += y + ' ';
}
return x;
}
console.log(testCycle(6));
//1 4 9 16 25 36
function testCycle(n) {
// var x = ""; // зачем нам текст
let x = 0; // число!
// for (i = 1; i <= n; i++){ // но надо до 2n–1 с шагом 2
for (i = 1; i <= (2 * n - 1); i += 2) {
// x += (2*i-1) + " "
x += i;
console.log(i, x);
}
return x;
}
testCycle(6) /*
1 1
3 4
5 9
7 16
9 25
11 36
36
*/function testCycle(n) {
let result = 0;
for (let i = 1; i <= n; i++) {
result += 2 * i - 1;
console.log(i, result);
}
return result;
}<body>
<div id="k"></div>
</body>#k {
position: absolute;
width: 100%;
height: 100px;
bottom: 0;
background: green;
}const object = document.querySelector('#k');
object.onmousedown = function(event) {
let shiftY = event.clientY - object.getBoundingClientRect().height;
object.style.zIndex = 1000;
document.body.append(object);
moveAt(event.pageY);
function moveAt(pageY) {
object.style.height = shiftY - pageY + 'px';
}
function onMouseMove(event) {
moveAt(event.pageY);
}
document.addEventListener('mousemove', onMouseMove);
object.onmouseup = function() {
document.removeEventListener('mousemove', onMouseMove);
object.onmouseup = null;
};
};
object.ondragstart = function() {
return false;
};
window.onkeydown = evt => {
if (evt.key == 'Tab') {
evt.preventDefault();
}
}