Introduction to Python(ihor)

Course Content

Introduction to Python(ihor)

Introduction to Python(ihor)

1. First Acquaintance with Python

The Very First Steps in Python How to Use Comments for Readability Perform Simple Math in Python Handle More Complex Math in Python Bringing Python Fundamentals Together

2. Variables and Types in Python

How to Store Numbers in Python Python Naming Rules for Variables How to Work with Variables in Python Data Types in Python Challenge: Converting Kilometers to Miles Store Text with Strings in Python String Indexing in Python String Slicing in Python Challenge: Retrieving Letters from String String Concatenation in Python

3. Conditional Statements in Python

Boolean Data Type in Python Challenge: Working with Comparison Operators How to Combine Conditions in Python Challenge: Working with Logical Operators Membership Operators and Type Comparisons in Python How to Use if/else Expressions in Python Challenge: Running a Grocery Store Challenge: Creating Odd and Even Logic if/elif/else Expressions Challenge: Running Grocery Store Extended Challenge: Weather Adviser

4. Other Data Types in Python

Python Lists Common List Methods in Python Challenge: Updating List Nested Lists in Python Challenge: Retrieving Information from Nested List Python Tuples Common Tuple Methods in Python Challenge: Updating Tuple Nested Tuples in Python Challenge: Retrieving Information from Nested Tuple Python Dictionaries Challenge: Creating Dictionary Common Dictionary Methods in Python Challenge: Updating Dictionary

5. Loops in Python

Explore the while Loop in Python Challenge: Working with the While Loop Explore the for Loop in Python Challenge: Working with the For Loop Range Function in Python Challenge: Using the Range Function How to Iterate Over Indexes in Python Explore Nested Loops in Python

6. Functions in Python

Built-in Functions in Python Challenge: Converting Heights How to Create Functions in Python Challenge: Writing First Function Use of if/else Statements in Python Functions Challenge: Identifying Positive Values Functions Without Return in Python Challenge: Creating Logging Function Modifying Functions in Python Challenge: Updating Logic of the Function Lambda Functions in Python Challenge: Creating Lambda Function

Boolean Data Type in Python

Python has the boolean (or logical) data type, which can have only two values True or False. It is primarily used for evaluating logical conditions. Below are the logical operators for comparison, which return a boolean value True if the condition is met and False if not.


              123456789
            
a = 10
b = 20

print("a == b:", a == b)   # Equal to
print("a != b:", a != b)   # Not equal to
print("a > b:", a > b)     # Greater than
print("a < b:", a < b)     # Less than
print("a >= b:", a >= b)   # Greater than or equal to
print("a <= b:", a <= b)   # Less than or equal to

String comparison is more complex than it seems. The expression below compares two characters, and the first thought might be that it will result in True because alphabetically, 'A' comes first.


              12
            
# Comparing two characters
print('A' > 'B')

When comparing characters like 'A' and 'B', you might wonder why 'A' > 'B' evaluates to False. This is because characters in Python are compared based on their Unicode values. Unicode is a standardized character encoding that assigns a unique number to each character, regardless of platform, program, or language.

To check the Unicode value of any character, you can use the ord() function. This function returns the Unicode code point of a given character.


              123
            
# The `ord` returns the number representing the character's unicode code
print(ord('A'))
print(ord('B'))

Since 65 is less than 66, the expression evaluates to False. Python compares strings character by character from left to right and stops as soon as it finds a difference.

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Section 3. Chapter 1

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