Create a simple calculator which can perform basic arithmetic operations like addition, subtraction, multiplication or division depending upon the user input.
Approach :
User choose the desired operation. Options 1, 2, 3 and 4 are valid.
Two numbers are taken and an if…elif…else branching is used to execute a particular section.
Using functions add(), subtract(), multiply() and divide() evaluate respective operations.
Example :
Please select operation -
1. Add
2. Subtract
3. Multiply
4. Divide
Select operations form 1, 2, 3, 4 : 1
Enter first number : 20
Enter second number : 13
20 + 13 = 33
# Python program for simple calculator
# Function to add two numbers
def add(num1, num2):
return num1 + num2
# Function to subtract two numbers
def subtract(num1, num2):
return num1 - num2
# Function to multiply two numbers
def multiply(num1, num2):
return num1 * num2
# Function to divide two numbers
def divide(num1, num2):
return num1 / num2
print("Please select operation -n"
"1. Addn"
"2. Subtractn"
"3. Multiplyn"
"4. Dividen")
# Take input from the user
select = int(input("Select operations form 1, 2, 3, 4 :"))
number_1 = int(input("Enter first number: "))
number_2 = int(input("Enter second number: "))
if select == 1:
print(number_1, "+", number_2, "=",
add(number_1, number_2))
elif select == 2:
print(number_1, "-", number_2, "=",
subtract(number_1, number_2))
elif select == 3:
print(number_1, "*", number_2, "=",
multiply(number_1, number_2))
elif select == 4:
print(number_1, "/", number_2, "=",
divide(number_1, number_2))
else:
print("Invalid input")
Output :
Please select operation -
1. Add
2. Subtract
3. Multiply
4. Divide
Select operations form 1, 2, 3, 4 : 1
Enter first number : 15
Enter second number : 14
15 + 14 = 29