• Write a program that reads in the size of the side of a square and then prints a hollow square of that size out of @ character and blanks. Your program should work for squares of all side sizes between 1 and 20. For example if a program reads a size of 5, it should print similar to the figure shown at the right side. W

Q: Code in c++

A: The following solution is

Q: Describe and discuss what is a downfeed portable system and where is it used?

A: DOWN FEED PORTABLE  SYSTEM:- A downfeed portable system is a type of portable system used to reduce…

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Variables and Constant

Constants and variables are widely used in mathematical equations and expressions. They are also commonly found in the domain of programming, where each language has its own way to differentiate between a constant and a variable. Since they have all sorts of applications, knowing their differences is a good place to start.