a = 1;
function inc(int, incValue)
if incValue == nil then incValue = 1 end;
local int = int + incValue;
return int;
end
print(inc(a))
print(inc(a,15))
YSA9IDE7CgpmdW5jdGlvbiBpbmMoaW50LCBpbmNWYWx1ZSkKICAgIGlmIGluY1ZhbHVlID09IG5pbCB0aGVuIGluY1ZhbHVlID0gMSBlbmQ7CiAgICBsb2NhbCBpbnQgPSBpbnQgKyBpbmNWYWx1ZTsKICAgIHJldHVybiBpbnQ7CmVuZAoKcHJpbnQoaW5jKGEpKQpwcmludChpbmMoYSwxNSkpICA=