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Complete Python examples

Créer un simple calculateur avec un programme Python

Complete Python examples

In this example, you will learn to create a simple calculator that can add, subtract, multiply, or divide based on user input.

To understand this example, you should understand the followingPython programmingTopic:

Create a simple calculator through functions

Example

# Program to create a simple calculator
# This function adds two numbers
def add(x, y):
　　　return x　+　y
# Subtract two numbers
def subtract(x, y):
　　　return x　-　y
# This function multiplies two numbers
def multiply(x, y):
　　　return x　*　y
# This function divides two numbers
def divide(x, y):
　　　return x　/　y
print("Select operation")
print("1.add")
print("2.subtract")
print("3.multiply")
print("4.divide")
# Accept user input
choice = input("Select (1/2/3/4):
num1　= float(input("Enter the first number: "))
num2　= float(input("Enter the second number: "))
if choice == '1':
　　　print(num1",+",num2,"=", add(num1,num2))
elif choice == '2':
　　　print(num1",-",num2,"=", subtract(num1,num2))
elif choice == '3':
　　　print(num1",*",num2,"=", multiply(num1,num2))
elif choice == '4':
　　　print(num1",/",num2,"=", divide(num1,num2))
else:
　　　print("Invalid input")

Output result

Select operation
1.add
2.subtract
3.multiply
4.divide
Select (1/2/3/4)　2
Enter the first number:　11
Enter the second number:　120
11.0　-　120.0 =　-109.0

In this program, we ask the user to select the required operation. Option1、2、3and4Valid. Take two numbers and execute a specific part using an if...elif...else branch. The user-defined functions add(), subtract(), multiply(), and divide() perform different operations.

Complete Python examples