Podcast
Questions and Answers
What is Python?
What is Python?
A popular programming language created by Guido van Rossum, released in 1991.
Which of the following is NOT a feature of Python?
Which of the following is NOT a feature of Python?
Python uses semicolons to complete a command.
Python uses semicolons to complete a command.
False
What do comments in Python start with?
What do comments in Python start with?
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When is a variable created in Python?
When is a variable created in Python?
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Which of the following types can a variable name not start with?
Which of the following types can a variable name not start with?
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What are the three types of case used for multi-word variable names?
What are the three types of case used for multi-word variable names?
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Variable names in Python are case-sensitive.
Variable names in Python are case-sensitive.
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What function is commonly used to output variables in Python?
What function is commonly used to output variables in Python?
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What does the int() function in Python do?
What does the int() function in Python do?
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How are strings defined in Python?
How are strings defined in Python?
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Study Notes
Python Overview
- Created by Guido van Rossum and released in 1991.
- Popular for web development, software development, mathematics, and system scripting.
- Compatible with multiple platforms like Windows, Mac, Linux, and Raspberry Pi.
Why Python?
- Simple, readable syntax similar to English.
- Fewer lines of code needed compared to other languages.
- Utilizes an interpreter system for immediate code execution and rapid prototyping.
- Supports procedural, object-oriented, and functional programming paradigms.
Python Syntax
- Emphasizes readability; commands are completed with new lines rather than semicolons.
- Uses indentation instead of curly brackets to define scopes for loops, functions, and classes.
Comments and Variables
- Comments initiated with
#
, improving code readability and preventing execution during testing. - Variables are containers for data values and are created upon first assignment.
- No explicit type declaration is necessary; types can change dynamically.
Type Casting
- Data types can be specified using casting functions.
String Declaration
- Strings can be declared using single or double quotes interchangeably.
Variable Naming Rules
- Can be a single character or descriptive word.
- Must start with a letter or an underscore, cannot start with a number.
- Only contains alphanumeric characters and underscores.
- Case-sensitive; for example,
age
,Age
, andAGE
are distinct variables. - Cannot use reserved Python keywords as variable names.
Multi-word Variable Naming Conventions
- Camel Case: e.g.,
myVariableName
. - Pascal Case: e.g.,
MyVariableName
. - Snake Case: e.g.,
my_variable_name
.
Output Variables
- Use the
print()
function to display variables, which can accept multiple inputs separated by commas. - The
+
operator works for number addition and string concatenation.
Data Types
- Integer (int): Whole numbers without decimals, positive or negative, of unlimited length.
- Floating Point (float): Numbers containing decimals, positive or negative.
-
String: Enclosed in single or double quotes; displayable through
print()
.
Type Conversion Functions
-
int()
: Converts to an integer from float or string where applicable. -
float()
: Converts to a float from integer, float, or string. -
str()
: Converts any data type into a string format.
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Description
Explore the fundamentals of Python programming in this Week 8 quiz. Learn about its history, various applications, and reason for its popularity across different platforms. Test your knowledge and enhance your computing skills with this engaging quiz.