Webastor - Programming Tips and Tricks

Hi, I would like to ask you some information, why must the return-type be defined for a function in python? I thank you please answer me fairly quickly.

Hi all, I would like to ask you a little problem, I hope you can help me, what is the distinction between string, stringbuffer, stringbuilder in php? Here, thank you please give me your opinion as soon as possible. I thank you in advance.