Get category URL knowing it's id

Question:

I have id of WP category on external resource. I know that if I have id of post I can create url like

http://example.com/?p={post_id}

But what if I know id of category? How can I generate link to it? Category permalinks look like

http://example.com/category/{category_slug}/

and I need to use something like

http://example.com/category/?cat_id={category_id}/

Answer:

If you have category ID you can create link to category like below :

<a href="/index.php?cat=7">Category Title</a>

For more details read from this link :

https://codex.wordpress.org/Linking_Posts_Pages_and_Categories

Thanks!