How to make a calculator With Python [Calculator]

What Will I Learn?

• You will learn Python looping and branching function
• You will learn Exception in Python language

Requirements

• python language
• Python writing procedure

Difficulty

• Intermediate

Tutorial Contents

Hello People, today I will teach you How to build tools with Python more precisely to make a calculator, why I said build tools? because of the plan I want to make this tool in the future with various features and teach you guys,

Okay now we start this tutorial.

• Open your Notepad
• Copy this source

def mtk():
    def daftar2():
        print ("") 
        print ("")
        print ("\tPanel Utopian")
        print ("\n============================")
        print ("")
        print ("\nChoose : ")
        for MataUang in ["1. Increment (+)","2. Reduction (-)","3. Multiplication (*)","4. Division (/)","5. Exit"]:
            print MataUang  
        print ("")        
        print ("\n============================")        
        
    def pilihan2():
    print ("") 
        p = input ("Input Your Choose : ")
   if p == 1:
            a = input("Input Your Value: ")
            b = input("Input Your Value: ")
            hasil = a + b
            print ("Your increment Result : "), hasil
            print ("\n============================")
            print ("")
            

        elif p == 2:
            a = input ("Input Your Value: ")
            b = input ("Input Your Value: ")
            hasil = a - b
            print ("Your Reduction Result : "), hasil
            print ("\n============================")
            print ("")
elif p == 3:
            a = input ("Input Your Value: ")
            b = input ("Input Your Value: ")
            hasil = a * b
            print ("Your Multiplication Result : "), hasil
            print ("\n============================")
            print ("")
            


        elif p == 4:
            a = input ("Input Your Value: ")
            b = input ("Input Your Value: ")
            hasil = a / b
            print ("Your Division Result : "), hasil
            print ("\n============================")
            print ("")
elif p==5:
            exit


    try:
        daftar2()
        pilihan2()
    except:
        print ("Number Only!!")

def daftar_utama():
    print ("")        
    print ("")
    print ("\tPanel Utopian")
    print ("\n============================")
    print ("")
    print ("\nChoose : ")
    for Menu_Utama in ["1. Calculators","2. Exit"]:
        print Menu_Utama
    print ("")
def pilihan_utama():
    q=input ("Input Your Choose : ")
    if q==1:
        mtk()
    elif q==2:
        exit

try:
    daftar_utama()
    pilihan_utama()
except:
   print ("Number Only!!")
def pilihan_utama():
    q=input ("Input Your Choose : ")
    if q==1:
        mtk()
    elif q==2:
        exit

try:
    daftar_utama()
    pilihan_utama()
except:
   print ("Number Only!!")

• okay I will give you an explanation of the above code.

• def mtk():
  Functions in Python are defined using the keyword def .
  After def no name recognition followed function with parameters between parentheses and end with colon :

on this tool def mtk(): for to marking the calculator menu.

for MataUang in ["1. Increment (+)","2. Reduction (-)","3. Multiplication (*)","4. Division (/)","5. Back","6. Exit"]:

print MataUang this code for looping function in python.
MataUang is a variable and will be called on print MataUang so it will output like this,

 p = input ("Input Your Choose : ")
        if p == 1:
            a = input("Input Your Value: ")
            b = input("Input Your Value: ")
            hasil = a + b
            print ("Your increment Result : "), hasil
            print ("\n============================")
            print ("")

on that source you can see at p = input ("Input Your Choose : ") variable p to save input from user and will be called at if p == 1:
which means if the variable p the user input in the form of 1 then the tool will run the program Increment, so also if user enter number 2 will run Reduction program, if the user enters a number that does not match the numbers on the menu then the program will stop and if the user input other than the number will issue a warning "Number Only !!" because we added Exception .

except:
        print ("Number Only!!")

and then variable a will save user input for the first number of data to be summed, and variable b will save user input for the second number of data to be summed, which will be summed to the hasil variable with called variable a and b.

def daftar_utama(): to mark the main menu.
at function def pilihan_utama(): you can see variable q for saved user input to select menu option between calculator or exit menu.

okay all now I'll show you the results of this tool

okay guys I think until now I teach you about making tool with python. and I wanna to say thanks for your attention and thanks for read this tutorial sorry if I'm wrong on this tutorial,

---

Posted on Utopian.io - Rewarding Open Source Contributors

---