How do you use `@function` to create custom CSS functions?
Description : Creating and using custom functions with `@function` in SASS.
Answer :
`@function` allows you to define custom functions inSASS to perform calculations and return values. For example, create a function like `@function calculate-rem($px) { @return $px / 16px + rem; }`. Use thisfunctionin your stylesheets to convert pixel values to rem units dynamically, facilitating consistent and scalable typography.