April Python Bootcamp Day 2

Most beginners think coding is hard…

But the truth?
It’s just about storing, understanding, and transforming data.

Today, you learned the foundation of Python — and this is where real programmers are built.

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 1. What is a Variable?

A variable is like a container that stores data.

name = "Alice"
age = 25

👉 Here:

• name stores a string
• age stores a number

💡 Think of variables as labeled boxes where you keep information.

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2. Data Types in Python

Python has different types of data:

🧩 Common Data Types

Data Type	Example	Description
int	10	Whole numbers
float	3.14	Decimal numbers
str	"Hello"	Text
bool	True	True/False values

Example:

a = 10        # int
b = 3.5       # float
c = "Python"  # string
d = True      # boolean

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3. Checking Data Type

Use type() to check:

x = 100
print(type(x))

👉 Output: <class 'int'>

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4. Typecasting (Type Conversion)

Typecasting means converting one data type into another.

Examples:

x = "10"

# Convert string to integer
y = int(x)

# Convert integer to float
z = float(y)

# Convert number to string
s = str(z)

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Important Note:

int("hello")  # ❌ Error

👉 You can only convert compatible values.

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Why Typecasting Matters?

• Taking user input
• Performing calculations
• Formatting output

Example:

age = input("Enter your age: ")
age = int(age)

print(age + 5)

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Real-Life Example

price = "100"
quantity = 2

total = int(price) * quantity
print("Total:", total)

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Assignment (Practice Time )

 Basic Level

1. Create variables:
   • Your name
   • Your age
   • Your favorite number
2. Print their data types.

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 Intermediate Level

3. Take user input for:
   • Name
   • Age

4. Convert age into integer and print:

   "Your age after 10 years will be: X"
   

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Advanced Level

5. Write a program:

# Input: price as string
# Input: quantity as int
# Output: total price

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6. Convert:

• int → float
• float → string
• string → int

Print all results.

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Bonus Challenge

7. What will be the output?

x = "5"
y = 2
print(x * y)

👉 Explain why.