How to create calculator in Python using functions

Here, we will create a Calculator in Python using functions. 

This will be a good exercise to practice functions in python and also to start making things a little complex.

As always, open your text editor and create a new Python file.

The calculator we are going to create will perform only 4 operations, which will be addition, subtraction, multiplication and division.

 

# function for adding
def addition(a, b):  
   return  a + b 
   
#function for subtraction
def subtraction(a, b): 
   return  a - b 
 
#function for multiplication
def multiplication(a, b): 
   return  a * b 
 
#function for division
def division(a, b): 
   return a / b  
 
#Menu
print("Enter:\n\n1.Addition\n2.Subtraction\n3.Multiplication\n4.Division\n")  
  
choice = input("Enter choice: ")  
  
a = int(input("Enter the first number: "))  
b = int(input("Enter the second number: "))  
  
if choice == '1':  
   print(addition(a,b))  
  
elif choice == '2':  
   print(subtraction(a,b))  
  
elif choice == '3':  
   print(multiplication(a,b)) 
    
elif choice == '4':  
   print(division(a,b))  
   
else:  
   print("Invalid choice")  

 

Output:

 

Enter:

1.Addition
2.Subtraction
3.Multiplication
4.Division

Enter choice: 3
Enter the first number: 2
Enter the second number: 3

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