What does operator precedence have to do with this? Ending a parameter list with a comma changes the output of the print keyword but not a function. Assignment

What does operator precedence have to do with this? Ending a parameter list with a comma changes the output of the print keyword but not a function. Assignment statements can contain function calls but not the print keyword. C style function calls are common, explicit, and consistent. Python adds the best combination of positional, variadic, and named parameters of any language I know. ML style has less punctuation and simpler grouping rules. Ruby has the weaknesses of both.