*4.13 (VOWEL OR CONSONANT?) Write a program that prompts the user to enter a letter and check whether the letter is a vowel or consonant. For a nonletter input, display invalid input. Here is a sample run: Enter a letter: B Enter B is a consonant Enter a letter: a is a vowel Enter a letter: Enter Enter # is an invalid input

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OOPs

In today's technology-driven world, computer programming skills are in high demand. The object-oriented programming (OOP) approach is very much useful while designing and maintaining software programs. Object-oriented programming (OOP) is a basic programming paradigm that almost every developer has used at some stage in their career. 

Constructor

The easiest way to think of a constructor in object-oriented programming (OOP) languages is: