Variables

You create a variable by assigning a value to it using the equals sign =.

# Assigning a string to the variable 'name'
name = "Alice"
# Assigning an integer to the variable 'age'
age = 30
# You can print variables to see their values
print(name)
print(age)
        

Core Data Types

Python has several built-in data types to represent different kinds of information:

• String (str): Used for text. Enclosed in single ('') or double ("") quotes. Example: "Hello, Python!"
• Integer (int): Used for whole numbers. Example: 100, -5
• Float (float): Used for numbers with decimal points. Example: 3.14, -0.01
• Boolean (bool): Represents one of two values: True or False. Crucial for control flow.

Type Casting

Sometimes you need to convert a variable from one data type to another. This is called type casting.

# A number stored as a string
age_string = "25"
print("Age as a string:", age_string)
Convert the string to an integer
age_integer = int(age_string)
print("Age as an integer:", age_integer)
You can now do math with the integer
next_year_age = age_integer + 1
print("Next year you will be:", next_year_age)

Checking the Type

You can use the type() function to find out the data type of any variable.