Creating HTML table using nested for loops

Question

I've been working on this for a day or so and I'm a bit stuck so I'm hoping I can come out of this with a clearer idea of what's going on.

Essentially I'm creating a HTML table using a nested for loop. The goal is to have a table that spans 7 columns per row.

var tbl = document.createElement("table");

for (var i = 15; i < 36; i++) {

    for (var j = 0; j < 7; j++) {
        var row = document.createElement("tr");
        var cell = document.createElement("td");
        var cellText = document.createTextNode(i);

        row.appendChild(cell);
        tbl.appendChild(row);

    }
    cell.appendChild(cellText);

}
$('#calendar').append(tbl);

Anticipated Result:

15 16 17 18 19 20 21
22 23 24 25 26 27 28
29 30 31 32 33 34 35

Actual Result:

15
16
17
18
19
20
21
22
23
...
35

Simplified the result for the sake of typing less but if anyone can please point me in the right direction, I'd love to know where I might going wrong with this. Thank you.

Answer 1

You can try like this

var calendar = document.getElementById('calendar');
var table    = document.createElement("table");                /*Create `table` element*/
var rows     = 3;
var cols     = 7;
var counter  = 15;
for (var i = 1; i <= rows; i++) {
	var tr = document.createElement("tr");                 /*Create `tr` element*/
	for (var j = 1; j <= cols; j++) {
	    var td = document.createElement("td");             /*Create `td` element*/
	    var cellText = document.createTextNode(counter);   /*Create text for `td` element*/
	    ++counter;
	    td.appendChild(cellText);                          /*Append text to `td` element*/
	    tr.appendChild(td);                                /*Append `td` to `tr` element*/
	}
	table.appendChild(tr);                                 /*Append `tr` to `table` element*/
}
calendar.appendChild(table);                                   /*Append `table` to your HTML `calender` DIV*/

<div id="calendar"></div>

Answer 2

Here you are: https://jsfiddle.net/0jvq1q0y/6/

var tbl = document.createElement("table");

for (var i = 15; i < 36; i++) {
if((i-15)%7==0)
            {
        var row = document.createElement("tr");
        tbl.appendChild(row);
            }
        var cell = document.createElement("td");
        var cellText = document.createTextNode(i);
        row.appendChild(cell);
            cell.appendChild(cellText);
}
$('#calendar').append(tbl);