Forth source code. Just a few demo, scroll to view all of them. This area is disposable because definitions are read already.code // var s = nexttoken('\n|\r'); last().help = s; end-code // ( <comment> -- ) Give help message to the last word. code cls vm.clearScreen() end-code // ( -- ) Clear output area code words for(var i=1; i<words.forth.length; i++) type(words.forth[i].name+" ") end-code // ( -- ) List all words code help for(var i=1; i<words.forth.length; i++) type(words.forth[i].name+" "+words.forth[i].help+'\n') end-code // ( -- ) List all words' help message code hide $("#source_box").hide() end-code // ( -- ) Hide the source code box by jQuery. code show $("#source_box").show() end-code // ( -- ) Show the source code box by jQuery. code hi type("Hello World!\n") end-code // ( -- ) Print hello world code . type(pop()) end-code // ( n -- ) Print the TOS top of the Forth data stack. code + push(pop(1)+pop()) end-code // ( a b -- a+b ) Add two numbers or strings code .s for(var i=0; i<stack.length; i++) type(i + ": " + stack[i] + '\n') end-code // ( -- ) Dump data stack code s" push(nexttoken('"'));nexttoken() end-code // ( <string> -- "string" ) String