README.md

Understanding Floats in Python

In this lesson, we will explore the use of decimal numbers, or floats, in Python. Floats are used to represent numbers with decimal points.

Examples

Defining Float Constants

# Example: Defining pi as a float
pi: float = 3.1415

# Example: Defining percent as a float (50%)
percent: float = 0.50

Representing Height in Meters

# Example: Defining height in meters as a float
height_in_meters: float = 1.72

Performing Mathematical Operations

# Example: Performing mathematical operations with floats
a: float = 0.5
b: float = 1.5

# Addition
result_addition = a + b  # Output: 2.0

# Subtraction
result_subtraction = a - b  # Output: -1.0

# Multiplication
result_multiplication = a * b  # Output: 0.75

# Division
result_division = a / b  # Output: 0.3333333333333333 (approximately 1/3)

Type Annotations with Floats

# Example: Type annotations with floats and integers
float_value: float = 10  # Integer can be assigned to a float

# Warning: Attempting to assign a float to an integer
# int_value: int = 1.5  # This will result in a warning

# Note: Python automatically converts integers to floats
float_from_int: float = 1.0  # This is compatible

Important Note: While integers can easily be converted to floats, attempting to assign a float to an integer without explicit conversion will result in a warning. Python cannot easily convert a float to an integer without rounding. Even if the float appears as a whole number, like 1.0, it remains incompatible with integers.