// task-table
let i;
let j;

const array = [i, j];

let str = "<table>";
for (i = 1; i <10; i++) {
    str += "<tr>";
    for (j = 1; j < 10; j++) {
        str += "<td style='width:70px'>" + i +"*"+j+"="+ i * j + "</td>";
    }
    str += "</tr>";
}
str +="</table>";
document.body.insertAdjacentHTML("afterbegin", str);