From Bash Reference Manual, a parameter:A parameter is an entity that stores values. It can be a name, a number, or one of the special characters listed below. A variable:A variable is a parameter denoted by a name.Is a variable is a parameter A, denoted by a parameter B which isalso a name? How do you understand the concept of a variable?since a parameter stores values, does that mean a parameter is a block in memory?I never heard of the concept of parameter in other languages suchas C, C++, Python.  Do the distinct concepts of parameter and ofvariable exist in programming languages besides bash? What are theirdefinitions in programming languages?Thanks.
parameter and variable in programming languages
programming languages