which of the following words are legal variable names in C++, and which are not?  And why? x1 EvilDarkness PennslyvaniaAve1600 1600PennsylvaniaAve Bobby_the_Robot Bobby+the+Robot whatThe??? amount count2 count2five 5count main main2

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Name Constants and Literal Values

A constant is a data item whose value cannot be modified throughout the program execution. When a constant is related to an identifier such as a variable, array, structure, or function, it is called a named constant. In most programming languages, the 'const' keyword is used to declare constants.