Python Programming Overview

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Questions and Answers

What decade was Python developed in?

  • 1990s
  • 1970s
  • 2000s
  • 1980s (correct)

Python syntax is case sensitive.

True (A)

What keyword is used to create functions in Python?

def

In Python, the statement 'my_num = 4' defines a variable called ______.

<p>my_num</p> Signup and view all the answers

Which of the following is NOT an example of a Python data type?

<p>Char (A)</p> Signup and view all the answers

Whitespace is not important in Python programming.

<p>False (B)</p> Signup and view all the answers

Name two control structures used in Python.

<p>if/elif/else, loops</p> Signup and view all the answers

Match the following control structures with their descriptions:

<p>for loop = Repeats a specified number of times while loop = Repeats until a condition is met if statement = Executes code based on a condition elif statement = Evaluates additional conditions</p> Signup and view all the answers

Which symbol is used to denote function definition in Python?

<p>def (B)</p> Signup and view all the answers

What is one of the primary goals of Python's design?

<p>To simplify the readability of code (A)</p> Signup and view all the answers

In Python, variables can be defined without assigning a value to them.

<p>False (B)</p> Signup and view all the answers

What does 'duck typed' mean in the context of Python variables?

<p>Duck typing means that the type of a variable is determined by its behavior (methods and properties), not by its explicit type definition.</p> Signup and view all the answers

Match the following Python keywords with their descriptions:

<p>return = Ends a function and sends a value back for = Initiates a loop that iterates over a sequence if = Tests a condition for true or false while = Repeats code as long as a condition is true</p> Signup and view all the answers

Which of the following statements about Python is true?

<p>Python is designed to be easy for humans to read and learn. (D)</p> Signup and view all the answers

In Python, colons are used to define the start of a control structure or function.

<p>True (A)</p> Signup and view all the answers

What is the purpose of functions in Python?

<p>To create logically separate and reusable ideas.</p> Signup and view all the answers

In Python, the symbol used for the comparison operator that checks equality is ____.

<p>==</p> Signup and view all the answers

Match the following Python variable types to their descriptions:

<p>Boolean = Represents True or False values String = A sequence of characters enclosed in quotes Integer = A whole number without a decimal Float = A number that contains decimals</p> Signup and view all the answers

Flashcards

What makes Python a high-level language?

Python is a high-level programming language, making it easier for humans to understand and write code compared to low-level languages.

What was Python's development goal?

Python was designed with readability in mind, making it easier to learn and use compared to other languages.

Is Python's syntax case-sensitive?

Python syntax is case-sensitive, meaning that 'myVariable' and 'myvariable' are treated as different variables.

Why does whitespace matter in Python?

Python uses whitespace, specifically indentation, to organize code blocks instead of using specific keywords or symbols.

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What is the purpose of colons in Python?

Python uses colons to denote the start of a code block for control structures like loops or function definitions.

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What naming convention is common in Python?

Python often uses snake_case for variable and function names, separating words with underscores.

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What is a function in Python?

Functions in Python are blocks of reusable code designed to perform specific tasks.

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How are functions defined in Python?

Functions are defined using the def keyword, followed by a name, parentheses, and a colon marking the start of the function body.

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What is a loop in Python?

Loops allow you to repeat a block of code multiple times.

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What is a for loop?

for loops iterate over a sequence, executing the code block for each element in the sequence.

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What is a string in Python?

A sequence of characters, like 'Hello world' or '123'.

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What is the 'def' keyword used for in Python?

They are used to define functions, which are reusable blocks of code.

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What are loops in Python?

These are blocks of code that repeat a certain number of times, like going through each item in a list.

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What are 'if/elif/else' statements used for in Python?

They are used to check if a condition is true before executing code.

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What are operators in Python?

These are symbols used to perform comparisons, like equality (==), inequality (!=), greater than (>), and less than (<).

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Study Notes

Python Overview

  • Python is a high-level programming language, meaning it's designed to be easier for humans to read than for computers to read.
  • Development of Python began in the 1980s.
  • Python was released in the 1990s.
  • Python's development aimed to enhance readability and thus, ease of learning.

Python Syntax

  • Python is a case-sensitive language.
  • Whitespace is significant in Python syntax; the number of spaces, line breaks, and tabs at the beginning of a line are relevant.
  • Colons define the scope of control structures and functions.
  • Variable and function names typically follow the snake_case convention (e.g., my_variable, get_data).
  • Python keywords include return, global, for, if/elif/else, while, def.

Python Functions

  • Functions are reusable blocks of code, creating logically separate and reusable ideas.
  • Defining a function uses the def keyword, followed by a name, parentheses, and a colon.
  • Functions can accept arguments and return values.

Variables and Data Types

  • Variables are assigned values (e.g., my_num = 4).
  • Python is a duck-typed language (type checking occurs at runtime).
  • Common data types include booleans, strings, integers, and floats.

Control Structures

  • Loops repeat code blocks.
  • for loops iterate a specified number of times.
  • while loops iterate until a condition is met or changes.
  • if/elif/else statements execute code based on conditions that evaluate to boolean values.
  • Operators used in conditions include ==, !=, >.

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