How to make calculator in python programming

 

What is calculator?

A calculator may be a device that performs arithmetic operations on numbers. The only the best calculators will do only addition, subtraction, multiplication, and division. Additional subtle calculators will handle exponential operations, roots, log s, pure mathematics functions, and hyperbolic functions. Internally, some calculators really perform all of those functions by continual processes of addition.

 

What is function in python ?

A operate may be a block of code that solely runs once it's known as. you'll be able to pass information, called parameters, into a operate. A operate will come information as a result.

 

Lets start  with calculator programming in python?

First step: I create one function and function name is add with x and y arguments

                      def add(x,y):

                                return  x+y

Second step : I create one function and function name is sub x and y arguments

                       def sub(x,y):

                                return  x-y

Third step : I create one function and function name is mul x and y arguments

                   def mul(x,y):

                                return  x*y

Fourth step : I create one function and function name is div x and y arguments

                   def div(x,y):

                                return  x/y

Fifth step : I select operation as per my requirement using print statement

                          print(“ ----- SELECT OPERATION-----”)

                          print(“ ----- PRESS 1 FOR ADDITION-----”)

                          print(“ ----- PRESS 2 FOR MULTIPLICATION-----”)

                          print(“ ----- PRESS 3 FOR SUBTRACTION-----”)

                          print(“ ----- PRESS 4 FOR DIVISION-----”)

 Sixth step : I run while loop till when condition is true

                        while True:

I take the input from my side and take select name  variable and take input

                                                select= input(“ enter choice(1/2/3/4):”)

Seventh step :Take the numeric digit in form of input using a and b variable name

                                                if choice in(‘1’,’2’,’3’,’4’):

                                                                a= float(input(“enter the first input”)

                                                                b=float(input(“enter the second input”)

Eight step : I run if elif else condition for selecting the operation

                                                                if select == ‘1’:

                                                                                print(a, “+”, b, ”=”, add(a,b))

elif select == ‘2’:

                                                                                print(a, “*”, b, ”=”, mul(a,b))

elif select == ‘3’:

                                                                                print(a, “-”, b, ”=”, sub(a,b))

elif select == ‘4’:

                                                                                print(a, “/”, b, ”=”, div(a,b))

                                                                break

                                                else:

                                                                print(“ERROR”)

Final output : Run the program

                                ----- SELECT OPERATION-----

                           ----- PRESS 1 FOR ADDITION -----

                           ----- PRESS 2 FOR MULTIPLICATION -----

                           ----- PRESS 3 FOR SUBTRACTION -----

                           ----- PRESS 4 FOR DIVISION -----

                                ENTER MY CHOICE – 3

                ENTER THE FIRST INPUT – 12

                ENTER THE SECOND INPUT  - 9

                    12*9= 108

Author

SomayMangla

Coderprogram