Write a java program that will read a text file that displays a list of the largest US Cities and their 2019 population. The user will be prompted to enter a file name and your program will print a title (“City Population”) and the list of cities in the file. Use either Scanner or JOptionPane to query the user for the filename. (The file provided is named “USCities.txt”.) The output should appear as follows:

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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.