What is the difference between CSS variables and preprocessor(SASS, LE

1.	What is the difference between CSS variables and preprocessor(SASS, LESS, Stylus) variables?
Answer» CSS variables can be used WITHOUT the NEED for a PREPROCESSOR. Currently, all the major BROWSERS support the CSS variables. CSS variable cascade. But the preprocessor variables don’t cascade. CSS variable can be accessed and manipulated in javascript.

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