See: <a href="/doc/reference/classes/ucalc/definevariable/">DefineVariable</a>, <a href="/doc/reference/classes/ucalc.expression/evaluate/">Evaluate</a>, <a href="/doc/tutorials/getting-started:-the-expression-parser/optimizing-performance-in-loops/">Optimizing Performance in Loops</a>, <a href="/doc/reference/classes/ucalc/parse/">Parse</a>, <a href="/doc/reference/classes/ucalc.item/value/value-double/">Value(double)</a>