Additional math support                                                                                                         RetroForth only provides a small number of math words. This is  an attempt to expand on those by adding many more common math   words.                                                                                                                          It also provides some support for infix, and displaying decimal numbers.                                                        : min ( x y -- x|y ) 2dup <if drop ;; then nip ;                : max ( x y -- x|y ) 2dup <if swap then drop ;                  : abs dup 0 <if negate ;; then ;                                : */ [ $adc88b 3, $f9f72ef7 , ] nip ;                                                                                                                                                                                                                           n e                                                             loc:                                                              : sqrt-closer 2dup / over - 2 / ;                               : sqrt-loop sqrt-closer 0; + sqrt-loop ;                        here ] ( x -- y ) 1 sqrt-loop nip ;                           ;loc alias sqrt                                                                                                                                                                                 n e                                                             : infix wsparse >number ;                                       : '+ infix + ;              : '- infix - ;                      : '* infix * ;              : '/ infix / ;                      : 'mod infix mod ;          : '/mod infix /mod ;                                                                                                                                                                                                                n e                                                             100 variable: precision                                         : .above precision @ / # ;                                      : .below precision @ mod . ;                                    : x.y dup .above '. emit .below ;                                                                                                                 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