Truncate detailed usage of smarty. What to do with it

Smarty truncate detailed usage .....
Ask:

What is the use of Smarty's truncate? Why do I want to intercept the length of the character and the actual interception of the difference so far??

Template Part code:
{$title |truncate:15}


PHP Handler Section code:
$smarty->assign ("title", "What are you doing if you had more money?");

How to show it is: what would ...

Isn't it a 15-character intercept?

Thank you..

------Solution--------------------
By default, Smarty is truncated to the end of a word.
If you want to accurately intercept the number of characters, change the third parameter to "true"

HTML Code

{$title |truncate:15: "...": true}
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