Python 24-Day Course - Day 1: Variables and Data Types

Day 1: Variables and Data Types

Variable Declaration

Python allows you to create variables without declaring a type.

name = "John"
age = 25
height = 175.5
is_student = True

Basic Data Types

Type	Example	Description
int	42	Integer
float	3.14	Floating-point number
str	"hello"	String
bool	True	Boolean
None	None	No value

Checking Types

x = 42
print(type(x))  # <class 'int'>

y = "hello"
print(type(y))  # <class 'str'>

Type Conversion

# String -> Integer
num = int("123")

# Integer -> String
text = str(456)

# Float -> Integer (decimal part is truncated)
n = int(3.7)  # 3

Today’s Exercises

1. Store your name, age, and height in variables and print them.
2. Use the type() function to check the type of each variable.
3. Convert the string "100" to an integer and add 50 to it.