Introduction to Python

Course Content

Introduction to Python

Introduction to Python

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

Explore the while Loop in Python

In programming, you often need your code to run repeatedly while a certain condition remains true.

Think of it like riding the subway you stay on the train until you reach your stop. If your destination is Station C, you might pass Station A and Station B before arriving at Station C.

You can achieve this behavior using a while loop, which follows this structure:

python

You can use this loop to print all numbers up to 10.


              1234567
            
# Assign starting number (counter)
i = 1

# While loop will print all the numbers to 10
while i < 10: # Condition
  print(i, end = ' ') # Action
  i = i + 1 # Increasing variable

Note

By default, the print() function outputs each result on a new line. However, using the end=' ' argument, we can separate multiple print() outputs with a space instead.

The loop's logic is shown above. Notice that the statement i = i + 1 is included inside the loop. Without this line, the loop would run indefinitely because the condition 1 < 10 would always remain True. To prevent infinite loops, it's essential to ensure the loop's condition eventually becomes False.

Everything was clear?

Thanks for your feedback!

Section 5. Chapter 1

some-alt