In this post we will see how to build/code a simple calculator…
we will go now step by step with an proper explanation of code and after some time we will also make a section were you will found the bunch of complete codes soon..
Now let’s begin…
Calculator
# first we create functions for doing proper operations as per the user required...
# Later on we will also discuss the what are functions and modules in python
def add(): # this is the method how we declared a function in python
x = float(input('Enter Values: ')) # this typecasting works with integers and decimals both
y = float(input('Enter Values: '))
return x + y
def subtract():
x = float(input('Enter Values: '))
y = float(input('Enter Values: '))
return x - y
def multiply():
x = float(input("Enter Values: "))
y = float(input("Enter Values: "))
return x * y
def divide():
x = float(input("Enter Values: "))
y = float(input("Enter Values: "))
return x / y
#Now make these in a separate new python file name that as "functions" name the file with your choice also if you want...
# Save this file in your current project directory# Now it's time to declare the major function
import os
def Calculator():
print('1. Add')
print('2. Subtract')
print('3. Multiply')
print('4. Divide')
Input = int(input('Choose Your Option: ')) # " Input " is variable and " input() " is function remember they are different not same
if Input == 1:
os.system('cls') # this function used only for clear the screen
print("You Choose Addition Method...")
result = add()
print('Result: ',result)
if Input == 2:
os.system('cls') # this function used only for clear the screen
print("You Choose Subtraction Method...")
result = subtract()
print('Result: ',result)
if Input == 3:
os.system('cls') # this function used only for clear the screen
print("You Choose Multiplication Method...")
result = multiply()
print('Result: ',result)
if Input == 4:
os.system('cls') # this function used only for clear the screen
print("You Choose Division Method...")
result = divide()
print('Result: ',result)
else:
os.system('cls')
print('Thanks using this calculator....')
Calculator()
# now save this file as ' main.py ' or 'Give whatever name you want...'Now we have two different files in your current directory or project folder i.e
- main.py
- functions.py
Now we see how we use functions written in functions.py file inside the main.py
Note:- Don’t excute the functions.py file by your self you just need to run main.py file and it willl autmatically run your functions.py file
Now you just need to Re-Edit your main.py file
# Now it's time to declare the major function
import functions
import time
import os
def Calculator():
print('Wellcome to Calculator...!')
print('1. Add')
print('2. Subtract')
print('3. Multiply')
print('4. Divide')
Input = int(input('Choose Your Option: ')) # " Input " is variable and " input() " is function remember they are different not same
if Input == 1:
os.system('cls') # this function used only for clear the screen
print("You Choose Addition Method...")
result = functions.add()
print('Result: ',result)
time.sleep(8) # this function is used here to pause the program for some time
if Input == 2:
os.system('cls') # this function used only for clear the screen
print("You Choose Subtraction Method...")
result = functions.subtract()
print('Result: ',result)
time.sleep(8)
if Input == 3:
os.system('cls') # this function used only for clear the screen
print("You Choose Multiplication Method...")
result = functions.multiply()
print('Result: ',result)
time.sleep(8)
if Input == 4:
os.system('cls') # this function used only for clear the screen
print("You Choose Division Method...")
result = functions.divide()
print('Result: ',result)
time.sleep(8)
else:
os.system('cls')
print('Thanks using this calculator....')
Calculator()In the main.py file enter the steps written below…
1.import functions # Enter this syntax below the import os line
2. Re-Write the line result = add() to result = functions.add()
3. Re-Write the line result = subtract() to result = functions.subtract()
4. Re-Write the line result = multiply() to result = functions.multiply()
5. Re-Write the line result = divide() to result = functions.divide()
6. Also import time module
7. write syntex after the ‘ time.sleep(8) ‘ after the ‘ print(‘Result: ‘,result) ‘ line
Now all set execute the main.py file your calculator will work fine
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