Numbers and Math

20 min In Progress

Learning Objectives

  • Use integers and floats
  • Perform arithmetic operations
  • Understand operator precedence
  • Write comments to document code

Integers and Floats

Python has two main numeric types: integers (whole numbers) and floats (decimal numbers).

x = 10       # integer
y = 3.14     # float
print(type(x))
print(type(y))

Arithmetic Operators

Python supports standard math operators: +, -, *, /, // (floor division), % (modulo), and ** (exponent).

a = 17
b = 5
print(a + b)   # 22
print(a - b)   # 12
print(a * b)   # 85
print(a / b)   # 3.4
print(a // b)  # 3
print(a % b)   # 2
print(a ** b)  # 1419857

Course Example: Calculate Speed

This example converts distance and time into multiple speed units using arithmetic.

distance_in_km = 150
time_in_hours = 2

distance_in_mi = distance_in_km / 1.6
distance_in_mtrs = distance_in_km * 1000

time_in_seconds = time_in_hours * 3600

speed_in_kph = distance_in_km / time_in_hours
speed_in_mph = distance_in_mi / time_in_hours
speed_in_mps = distance_in_mtrs / time_in_seconds

print("The speed in kilometers per hour is:", speed_in_kph)
print("The speed in miles per hour is:", speed_in_mph)
print("The speed in meters per second is:", speed_in_mps)

Course Example: Circle Calculations

Using a constant and the exponent operator to compute circle properties.

PI = 3.14159
radius = 7

area = PI * radius**2
circumference = 2 * PI * radius

print("Circumference of the circle:", circumference)
print("Area of the circle:", area)

📝 Exercise: Temperature Converter

Write a script that converts a Celsius temperature to Fahrenheit using the formula: F = (C × 9/5) + 32.

code.py
Output

            

        

    


    

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