Suppose you have invited me to your home and ask, ‘Madhusudan, what would you like
to have? Lemon juice or a soft drink or plain water?’ I may ask for any one of these three
items. Do you require different types of glasses to serve these items? No, any glass can
hold lemon juice or a soft drink or plain water. It is not necessary to have different types of
glasses to hold different types of liquid. Similarly, in programming, it is possible to write a
generic function that can perform the required operation ...
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