How to put multiple lines in a Markdown table cell (multiline table)

To create an HTML table in Markdown where a cell in the table has multiple lines — i.e., a multiline cell — use the HTML <br> tag to make the line display as multiple lines, like this:

| Format   | Tag example |
| -------- | ----------- |
| Headings | =heading1=<br>==heading2==<br>===heading3=== |
| New paragraph | A blank line starts a new paragraph |
| Source code block |  // all on one line<br> {{{ if (foo) bar else   baz }}} |

I made the <br> tags in that Markdown text bold so they’re easy to see. That Markdown text produces this HTML table output:

Format Tag example
Headings =heading1=
==heading2==
===heading3===
New paragraph A blank line starts a new paragraph
Source code block // all on one line
{{{ if (foo) bar else baz }}}

In summary, if you need to have a table cell span multiple lines when writing Markdown, use the HTML <br> tag, as shown.