Exercise 04-10:
Write a program that reads two numbers and asks what operation you want to perform. You must be able to calculate sum (+), subtraction (-), multiplication (*), and division (/). Display the result of the requested operation.
Answer:
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# Python From Scratch
# Author: Nilo Ney Coutinho Menezes
# Editora Novatec (c) 2010-2025 - LogiKraft 2025
# Site: https://pythonfromscratch.com
# ISBN: 978-85-7522-949-1 (Paperback), 978-85-7522-950-7 (hardcover), 978-85-7522-951-4 (ebook)
#
# File: chapter 04/exercise-04-10.py.py
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a = float(input("First number:"))
b = float(input("Second number:"))
operation = input("Enter the operation to perform (+, -, * or /):")
if operation == "+":
result = a + b
elif operation == "-":
result = a - b
elif operation == "*":
result = a * b
elif operation == "/":
result = a / b
else:
print("Invalid operation!")
result = 0
print("Result: ", result)