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A parent class variable can refer to a child class object. This is called polymorphism, and this video introduces the concept.

Learn how to determine the runtime class of an object so you can cast it to the orrect data type.

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You use a Scanner based on a File object to read from files. You'll need to handle a checked exception when you do that.

This is Chapter 10 from Python for Informatics - Exploring Information. From www.pythonlearn.com. All Lectures: ...

There are different kinds and subclasses of Exception. This video describes the Exception hierarchy and talks about checked vs.

So declarative has the idea that you don't tell a program what to do. What are all the other programming languages or paradigms?

In Python, object-oriented Programming (OOPs) is a programming paradigm that uses objects and classes in programming.

Find out the limits of using casting when working with polymorphism.

This video describes how to use a dictionary --- a set of key-and-value pairs. Other programming languages have similar ...

This is Chapter 7 for Python for Informatics. www.pythonearn.com All Lectures: ...

How to pass objects to a function and get objects returned back from functions.

This is Chapter 9 - Dictionaries from Python for Informatics - Exploring Information. www.pythonlearn.com All Lectures: ...

You use an if statement to make decisions about whether to take an action or not. You use an if/else statement to decide whether ...

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Using function prototypes allows you to call functions before you have defined their function body.

You can organize your files into packages and control which parts of them other programmers have access to by setting their ...

You can have multiple methods with the same name as long as the number and/or types of the parameters is different.

Jeff starts simulating the gravitational physics of a single-star system using realistic physics values for the Solar System and ends ...