a = int(input("Enter first number: "))
b = int(input("Enter second number: "))

print("1.Add 2.Sub 3.Mul 4.Div")
choice = int(input("Enter choice: "))

if choice == 1:
    print(a + b)
elif choice == 2:
    print(a - b)
elif choice == 3:
    print(a * b)
elif choice == 4:
    print(a / b …

for i in range(1, 21):
    if i % 2 == 0:
        print(i)

2
4
6
8
10
12
14
16
18
20

text = input("Enter text: ")
print("Length:", len(text))

Enter text:  7


Length: 1

text = input("Enter text: ")
print("Reversed:", text[::-1])

Enter text:  5


Reversed: 5

a = int(input("Enter first: "))
b = int(input("Enter second: "))

a, b = b, a

print("a =", a)
print("b =", b)

Enter first:  23
Enter second:  12


a = 12
b = 23

num = int(input("Enter number: "))
print("Cube =", num ** 3)

Enter number:  5


Cube = 125

num = int(input("Enter number: "))
if …

from fastapi import FastAPI
from pydantic import BaseModel

app = FastAPI()

# Sample in-memory "database"
items = [
    {"id": 1, "name": "Laptop", "price": 800},
    {"id": 2, "name": "Phone", "price": 500}
]

# -----------------------
# GET endpoint
# -----------------------
@app.get("/items")
def get_items():
    return {"items": items}


# -----------------------
# POST endpoint
# -----------------------

class Item(BaseModel):
    name: str
    price: float

@app.post("/items")
def create_item …