Variables & Data Types - The Technical Interview | Introduction ~ Episode 0.3
Hey Coders! Foundational to any programming language are variables and data types, and python is no different! Variables are used to store data, so they can be retrieved, updated, and used later in your script, and since python is dynamically typed, those variables can even change their data type! Be sure to learn all the ins and outs of variables and data types in this video, because we'll need them for basically every interview question that will follow.
Answers to Post-Video Quiz:
1. A Variable stores data. A Data Type is a classification for a certain piece of data that determines the operations that can be performed on it.
2. First write the variable name, then a single equal sign, then the value you want assigned to that variable. ( variable_name = "value" )
3. A statically typed language enforces that a variable hold the same data type throughout the script. A dynamically typed language gives the freedom for a variable to change its data type, or put another way, a variable's data type is determined at run time, not compile time. Python is dynamically typed.
4. A weakly typed language has the freedom to implicitly convert a piece of data's type. In a strongly typed language, once a variable has been given a type, the only way to change that is if the developer explicity casts it into another type or reassigns it. Python is strongly typed.
5. Use the built-in function type()
Check out the source code on GitHub:
https://github.com/davidtheweiss/pyth...
❤️ Support the ongoing growth of this channel! / davidweissprogramming
🧑💻 Python Documentation:
https://docs.python.org/
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🕒 Timestamps
0:00 Intro
0:12 Variables, conceptually
0:57 Data types, conceptually
1:55 Python is DYNAMICALLY TYPED
3:05 Declaring variables the standard way
3:55 Declaring variables the more concise way
5:02 Variable naming conventions
7:10 Python is STRONGLY TYPED
10:00 Post Video Quiz
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