Python

 #-------------------------------- #--------- PHY 62---------------- #-------------------------------- Modules a group of functions , classes, variables saved in a file called Modules.it is a phython file. Every phyton file is a module. x=888 name ='afs' def add(a,b):     print(a+b) def product(a,b):     print(a*b)          --- save this file as abc.py  then in another file import abc(modulename)                                             modulename.variablename                                             modulename.functioname()          biggest advantage is we can use existing module in our file.      Advantage:     Code Reusability     Readibiltiy  ...