Lua 5.1 (2006) has lexical scoping, tail calls, multiple return vales with assignment lists, semicolons are actually optional & most importantly: coroutines. ES

Lua 5.1 (2006) has lexical scoping, tail calls, multiple return vales with assignment lists, semicolons are actually optional & most importantly: coroutines. ES6 adds some of these features. Lua 5.3 has both integer and floating-point types.