Difference between do follow and a no follow link

What is the difference between do follow and a no follow link

By default, all the links are do follow links unless they are modified to be nofollow links manually or are automatically changed by a website setting. Dofollow links pass along what the SEO community commonly calls “link juice.”

nofollow is a value that can be assigned to the rel attribute of an HTML an element to instruct some search engines that the hyperlink should not influence the ranking of the link's target in the search engine's index.

Nofollow links are links that are generated with HTML code. These are introduced to reduce some type of search engine spam. This links do not pass on link juice and so does not boost your creditability and website ranking. Using no follow attribute you can prevent your site from credit passing another site.
Do follow links are hyperlinks that allow search engine and humans to follow them. They pass through link juice so that it receives links from high-authority sites. They improve your site authority and also boost your SEO effect.

Dofollow links are hyperlinks that tell the search engines to pass along their page rank to influence on outbound links. This factor affects a lot for SEO purpose. If you get more do follow links, then search engines will decipher your links as back links and you have more chances to receive positive values for your site's ranking.

Nofollow links are exactly the opposite. These hyperlinks don't have the ability to pass on a page rank status to other websites. Nofollow links don't consider as crawling links from search engines and so the link associated with Nofollow websites won't crawl by search engines.