From the thread on boolang here: http://groups-beta.google.com/group/boolang/browse_frm/thread/dc389436c6463bdb/7a9708de1b21d23c This patch allows you to use spaces to group digits in long numbers to aid readability, like in the examples below. It can easily be changed to allow underscores instead of spaces (or both). n = 1 000 000 n2 = 1 000 .00 //can't have space after decimal point n3 = 1 000 000 ms //timespans and other literals work n4 = .0 0 1 //only one space allowed btw each number n5 = 1 000 L