We often read (including in the book Advanced Bash-Scripting Guide by Mendel Cooper) that if we pass variable names as parameters to functions, they will be treated as string literals and cannot be ...

System and User Environment Variables have always been a complex topic of discussion for day-to-day Windows OS users. What do they do? A tutorial on the internet said to add a PATH variable, but what ...

Otherwise they have no special meaning. _ is a character which is suitable for identifier names just like letters. Names with leading underscores however are reserved for implementation of the ...