Question: What are variables, and why do we need them in programming? Give some examples of variables you would create. Should variables containing numbers always be

What are variables, and why do we need them in programming? Give some examples of variables you would create.
Should variables containing numbers always be declared integer or floating-point data types? Why or why not? Name potential examples.
What are constants, and how do we use them in our programs?
What is the difference between an implicit cast and an explicit cast?

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