Python basics

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1. Variables (चर):

Variables ko hum data ko store karne ke liye use karte hain.

Example:

x = 5 # x mein 5 store kar rahe hain

2. Data Types (डेटा प्रकार):

Python mein kai types ke data hote hain, jaise:

Integer (पूरा अंक):

age = 25 # integer type

Float (दशमलव अंक):

price = 19.99 # float type

String (स्ट्रिंग):

name = "Amit" # string type

Boolean (बूलियन):

is_active = True # boolean type

3. Operators (संचालक):

Python mein kuch basic operators hain, jo hum values par operations karne ke liye use karte hain:

Addition (+):

a = 10

b = 5

result = a + b # result = 15

Subtraction (-):

result = a - b # result = 5

Multiplication (*):

result = a * b # result = 50

Division (/):

result = a / b # result = 2.0

4. If Statement (यदि कथन):

if statement ko hum condition check karne ke liye use karte hain. Example:

age = 18

if age >= 18:

    print("Aap Vayask hain") # Agar age 18 ya zyada hai toh yeh print hoga

else:

    print("Aap Nabalig hain") # Agar age 18 se kam hai toh yeh print hoga

5. Loops (लूप):

Loop ka use kisi code ko baar-baar chalane ke liye hota hai.

For Loop:

for i in range(5): # yeh 0 se lekar 4 tak print karega

    print(i)

While Loop:

count = 0

while count < 5:

    print(count)

    count += 1 # count ko 1 badhate hain

6. Functions (कार्य):

Functions ka use hum code ko modular banane ke liye karte hain, taaki hum ek task ko baar-baar call kar sakein. Example:

def greet(name):

    print("Namaste, " + name)

greet("Amit") # yeh 'Namaste, Amit' print karega

7. Lists (सूची):

List ka use hum ek se adhik cheezon ko store karne ke liye karte hain. Example:

fruits = ["Apple", "Banana", "Mango"]

print(fruits[0]) # yeh "Apple" print karega

8. Dictionaries (शब्दकोश):

Dictionaries ka use key-value pairs ko store karne ke liye hota hai. Example:

person = {"name": "Amit", "age": 25}

print(person["name"]) # yeh "Amit" print karega

9. Comments (टिप्पणियाँ):

Comments ka use hum code ko samjhane ke liye karte hain, jo Python interpreter ignore karta hai. Example:

# Yeh ek comment hai

print("Hello, World!") # Yeh line screen par print karegi

10. Input (इनपुट):

User se input lene ke liye input() functi

on ka use karte hain. Example:

name = input("Apna naam daalein: ")

print("Namaste, " + name)