Python Program to Make a Simple Calculator

In this example you will learn to create a simple calculator that can add, subtract, multiply or divide depending upon the input from the user.

Source Code: Simple Caculator by Making Functions

• ''' Program make a simple calculator that can add, subtract, multiply and divide using functions '''
• 
  
• # This function adds two numbers 
• def add(x, y):
•    return x + y
• 
  
• # This function subtracts 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")
• 
  
• # Take input from the user 
• choice = input("Enter choice(1/2/3/4):")
• 
  
• num1 = int(input("Enter first number: "))
• num2 = int(input("Enter 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

Select operation.
1.Add
2.Subtract
3.Multiply
4.Divide
Enter choice(1/2/3/4): 3
Enter first number: 15
Enter second number: 14
15 * 14 = 210

In this program, we ask the user to 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. User-defined functions add(), subtract(), multiply() and divide()evaluate respective operations.

If you have any queries regarding this topic then comment below.

                               Thank you :)