Python Basics Refresher

Variables & Data Types

Python supports various data types like int, float, string, and boolean.

name = "John"
age = 25
is_active = True
height = 5.9

Task: Declare a variable score and assign a value of 100.

Use if, elif, and else to control flow.

score = 85
if score >= 90:
    print("Excellent!")
elif score >= 75:
    print("Good Job!")
else:
    print("Keep Trying!")

Task: Add a condition for score < 50 that prints "Needs Improvement".

Loops help in iterating over sequences or running code multiple times.

for i in range(5):
    print("Iteration:", i)

Task: Create a loop that prints numbers from 1 to 10.

Functions allow code reuse and better organization.

def greet(name):
    print("Hello, " + name + "!")

greet("Alice")

Task: Write a function that takes two numbers and returns their sum.

Lists store multiple values in a single variable.

fruits = ["apple", "banana", "cherry"]
print(fruits[0])

Task: Add "mango" to the above list.

Dictionaries store data in key-value pairs.

student = {"name": "John", "age": 20}
print(student["name"])

Task: Add a key "grade" with value "A" to the dictionary.

A concise way to create lists.

squares = [x**2 for x in range(5)]
print(squares)

Task: Create a list comprehension to store even numbers from 1 to 10.