node yup.js -? for info on flags. Or, read this:
yup.js by Conor O'Brien flag name | purpose ===========+=============================================== -l | "local"; runs following arg as yup code -d | "debug"; display stack at each step -s | "string input"; designates the next item as a | string, interpreted as series of ASCII char | codes -n | "numeric input"; designates the next item as | a number -w | "whitespacevariant"; notices extra spaces | in code -r | "no round"; does not round long decimals -c | "disable comments" -p | "print stack"; prints the contents of the | stack in the end -x | set decimal place to which to round -cheat | ... -t | translate a cheat program to a regular one -te | -t, but eliminates excess characters
Yup. That's just about it. Read the wiki for information as how to use the language.