# Module 1 - Python Basics

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Learning objectives

* Demonstrate an understanding of types in Python by converting or casting data types such as strings, floats, and integers.
* Interpret variables and solve expressions by applying mathematical operations.
* Describe how to manipulate strings by using a variety of methods and operations.
* Build a program in JupyterLab to demonstrate your knowledge of types, expressions, and variables.
* Work with, manipulate, and perform operations on strings in Python.
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> Introduction to Python

1. It's clear and readable syntax.
2. It has a huge global community and a wealth of documentation.
3. It has library for data science.

> Getting Started with Jupyter

The video helps us to know how to use Jupyter notebook

> Hands-on Lab: Write Your First Program

- [First Python Code](https://github.com/jacksonchen1998/IBM-PY0101EN-Python-Basics-for-Data-Science/blob/main/Module_1/writing_your_first_python_code.ipynb)

> Types

This video introduces data type in Python and how to change data type.

Integer, float, boolean.

> Hands-on Lab: Types

- [Types of Data](https://github.com/jacksonchen1998/IBM-PY0101EN-Python-Basics-for-Data-Science/blob/main/Module_1/working_with_types_in_python.ipynb)

> Practice Quiz: Types

1. What is the data type of the entity 43?
:::spoiler Answer
`int`
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2. What data type does 3.12323 represent?
:::spoiler Answer
`float`
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3. What is the result of the following: int(3.99)?
:::spoiler Answer
`3`
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> Expressions and Variables

This video introduces both expression and variable.

> Hands-on Lab: Expression and Variables

- [Variables and Expressions](https://github.com/jacksonchen1998/IBM-PY0101EN-Python-Basics-for-Data-Science/blob/main/Module_1/working_with_variables_and_expressions_in_python.ipynb)

> Practice Quiz: Expressions and Variables

1. What is the result of the following operation? 11//2
:::spoiler Answer
`5`
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2. What is the value of x after the following is run?
:::spoiler Answer
`2.0`
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3. Which line of code will perform the action as required for implementing the following equation?
$y = 2x^2 - 3$
:::spoiler Answer
`y = 2 * x * x - 3`
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> String Operations

1. **Strings in Python** – A sequence of characters enclosed in quotes, supporting spaces, digits, and special characters.
2. **Indexing & Slicing** – Access characters using positive or negative indices; slicing extracts parts of the string.
3. **Operations** – Strings support concatenation (`+`), replication (`*`), and length retrieval (`len()`).
4. **Immutability** – Strings can't be modified in place; changes create a new string.
5. **Escape Sequences** – `\n` (new line), `\t` (tab), `\\` (backslash), and raw strings (`r"string"`) for ignoring escape sequences.
6. **String Methods** – `.upper()` (uppercase), `.replace()` (substring replacement), `.find()` (search substring).

> Hands-On Lab: String Operations

- [String](https://github.com/jacksonchen1998/IBM-PY0101EN-Python-Basics-for-Data-Science/blob/main/Module_1/string_operations.ipynb)

> Practice Quiz: Expressions and Variables

1. What is the result of the following? `Name[-1]`
`Name = "Michael Jackson"`
:::spoiler Answer
`n`
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2. What is the result of the following? `print("AB\nC\nDE")`
:::spoiler Answer
`AB`
`C`
`DE`
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3. What is the result of following? `"hello Mike".find("Mike")`
:::spoiler Answer
`6`
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