abs($number) Returns the absolute value of a number.

Pattern: :last-of-type   Definition: The :last-of

floor($number) Rounds a number down to the previous whole number.

Pattern: :checked   Definition: The :checked

Nested Rules Sass allows CSS rules to be nested within one another. The inner rule then only applies within the outer rule’s selector. For example:

hsl($hue, $saturation, $lightness) Creates a Color from hue, saturation, and lightness values

to_lower_case($string) Convert a string to lower case,

str_slice($string, $start-at, $end-at:-1) Extracts a substring from $string. The substring will begin at index

Function Directives It is possible to define your own functions in sass and use them in any value or script context. For example: