[tzs]

In addition to Lua, these languages are 1-based: ALGOL, AWK, COBOL, Fortran, Julia, Mathematica, MATLAB, R, PL/I, and RPG.

[ufo]

BTW, FORTRAN is the big reason Lua has 1-based indexing. Lua' s first users were engineers, which were more familiar with FORTRAN.

[kencausey]

And Smalltalk