Friday, March 27, 2015
Subtraction Program In Python - Python Programs - Python Tutorial
Subtraction Program in Python
In this Python programming, tutorial we are going to create a simple Subtraction Program in Python. In this program, we are going to add the ability to use floats not integers.
Functions and Methods Used in This Program
- input()
- float()
- print()
- .format()
- round()
Step 1 – Open Your Text Editor
Open your text editor in this tutorial we use Sublime Text 3
Step 2 – Save your file
Save your file by pressing command + s or control + s. Name your file subtraction.py and save to your desktop.
Step 3 – Create Welcome Print Statement
We want to welcome our users to our program so we will add a simple print statement doing so.
#Create Welcome Print Statement
print("Welcome to our subtraction program")
Step 4 - Get the users first number
In this step, we will get the users number using input() and then convert that number to a floating point number using float(). Then we will assign the value to a variable called firstnum.
#Get the users first number
print("Welcome to our subtraction program")
firstnum = float(input("What is your first number. "))
Step 5 – Get the users second number
This step is similar to step 4 with the only difference being we are going to assign the value to the user gives to a new variable called secondnum.
#Get the users second number
print("Welcome to our subtraction program")
firstnum = float(input("What is your first number. "))
secondnum = float(input("What is your second number. "))
Step 6 – Get Users Difference
This step we will get the users difference between two numbers and round the number to two numbers after the decimal and save the difference to a variable called thesum.
#Get Users Difference
print("Welcome to our subtraction program")
firstnum = float(input("What is your first number. "))
secondnum = float(input("What is your second number. "))
thesum = round(firstnum - secondnum, 2)
Step 7 – Print The Difference Back to User
This is our final line of code in our little program here. We want to print the difference back to the user so to do that we use a print() statement and format the string print backs the value within thesum.
#Print The Difference Back to User
print("Welcome to our subtraction program")
firstnum = float(input("What is your first number. "))
secondnum = float(input("What is your second number. "))
thesum = round(firstnum - secondnum, 2)
print("Your difference is ".format(thesum))
Step 8 – Run The Program
Open your terminal or command prompt. Change into your desktop and run the program by typing python3 subtraction.py
#Run The Program
Thomass-MBP:~ Tommy$ cd desktop
Thomass-MBP:desktop Tommy$ python3 subtraction.py
Welcome to our subtraction program
What is your first number. 4
What is your second number. 5
Your difference is -1.0
Now that you have seen the way to build a simple subtraction program in Python with floating point numbers. Play with the program try to improve it and make your own modifications. If you can break let us know so we can do a tutorial how to improve the subtraction program. If you have any questions leave a comment below and we will help you.
Subtraction Program In Python - Python Programs
Thursday, March 26, 2015
Subtraction in Python - Python Numbers - Python Tutorial
Subtraction in Python
In the previous tutorial, we covered addition which was a very simple tutorial. In this tutorial, we will look at subtraction in Python which is another very simple subject. Subtraction works as expect in Python as simple as it was in grade school.
To perform subtraction, in Python we use the minus(-) symbol. In this tutorial, we will be doing all our code in the Python Interpreter. To follow along open your Python interpreter and try some of the examples below.
Integer Subtraction In Python
The following are just basic examples of subtracting Python integers.
#Integer Subtraction in Python
>>> 8 - 4
4
>>> 345 - 67
278
Float Subtraction in Python
The following are just basic examples of subtracting Python floats or floating point numbers.
#Float Subtraction in Python
#simple float subtraction
>>> 6.7 -98
-91.3
>>> 67.43 - 98.76
-31.33
#fixing float accuracy
>>> 8.8 - 1.5
7.300000000000001
#default round function no numbers after the decimal
>>> round(8.8 - 1.5)
7
#fix for one number after the decimal
>>> round(8.8 - 1.5, 1)
7.3
Now that you have seen how easy subtraction in Python you can now simply add and subtract numbers using your Python code. If you have any questions about subtraction in Python leave a comment below and we will do our best to help you out.
Subtraction in Python - Python Numbers
Addition Program in Python - Python Tutorial
Addition Program in Python
In this tutorial, we are about build a very simple addition program in Python. We will show how to build a simple program that will add two integer numbers that a user gives us via the terminal or command prompt and then we will return the sum of those two numbers to the user. The program will be accessible to download at the end of the tutorial. Just try to follow along the more you practice writing programs in Python the more you will learn.
Building the Addition Python Program
We will be using sublime text as our text editor to build this program. We will be writing our code using Python 3 syntax. We will run the code via our terminal or command prompt.
Step 1 - Open Text Editor
Open your text editor so we can write the code for our program.
Step 2 - Save your program
Save your program to your desktop as addition.py
Step 3 - Write Welcome Message For Our Program
Here we will use a simple print statement to welcome our users to our program.
#Write Welcome Message For Our Program
print("Welcome to our addition program")
Step 4 - Get Users First Number
In this step, we will get the users first number using input() and then convert the number to an integer using int() and assign a variable to the object that holds the users first number.
#Get Users First Number
print("Welcome to our addition program")
firstnum = int(input("Give us your first number. "))
Step 5 – Get Users Second Number
In this step, we do the same for the previous step above but we give this user input a different variable.
#Get Users Second Number
print("Welcome to our addition program")
firstnum = int(input("Give us your first number. "))
secondnum = int(input("Give us your second number. "))
Step 6 – Perform The Equation
In this step, we will add the users two numbers together and then assign the sum a variable.
#Perform The Equation
print("Welcome to our addition program")
firstnum = int(input("Give us your first number. "))
secondnum = int(input("Give us your second number. "))
thesum = firstnum + secondnum
Step 7 – Return The Sum To The User
We will return the sum of the user. We will print a string to the user and format the string using a format() method to add our sum into the string.
#Return The Sum To The User
print("Welcome to our addition program")
firstnum = int(input("Give us your first number. "))
secondnum = int(input("Give us your second number. "))
thesum = firstnum + secondnum
print("Your sum is ".format(thesum))
Step 8 – Run The Program
Open your terminal or command prompt and change into your desktop. To run the program, simply type python3 addition.py and press return or enter. The program will ask you to input a number then press return. The program will again prompt you to add your second number again input your number then press return. Now the program will return your sum to you. This is a very simple program in Python.
If you have any questions about Addition Program in Python please leave a comment below and we will help you out.
Addition Program in Python
Booleans In Python - Python Numbers - Python Tutorial
Booleans In Python
In this Python tutorial, we are going to look at booleans in Python. Booleans are sometimes called truth statements in programming. Booleans are returned only a True or False. You may be asking why we are covering booleans in the numbers section our Python tutorial. Booleans are indeed part of the integer family. A True boolean is equal to 1 and a False boolean is equal to 0.
Boolean Examples in Python
We will be checking out examples of booleans. Some of the methods, operators or functions may have not been covered yet in our tutorial series. Just follow along we are going to get to all these very shortly. All these examples will be performed in our Python interpreter.
#boolean Examples in Python
#Boolean Operations
>>> False or True
True
>>> True or False
True
>>> False or False
False
>>> True or True
True
>>> True and False
False
>>> True and True
True
>>> False and False
False
>>> not False
True
#Comparison Operators
>>> 7 < 9
True
>>> 8 > 8
False
>>> 8 != 9
True
>>> 8 == 8
True
>>> 8 <= 9
True
Proof That Booleans are Integers
#Proof That Booleans are Integers
>>> True + False
1
>>> True * False
0
>>> True ** 8
1
>>> type(True)
<class 'bool'>
>>> a = True + False
>>> type(a)
<class 'int'>
We will do a lot of work with Python booleans over the next couple of Python tutorials. If you have any questions about booleans in Python leave, a comment below so we can help you.
Booleans In Python - Python Numbers
str() - Python Tutorial
str() Built-in Function
str() is a built-in function in Python that will convert an other type like a integer, float, list, tuple and so on to a string.
Str() Syntax
syntax(argument)
The argument can be a integer, floating point number, list, tuple, dictionary, file, and so on. The argument will be converted to a string.
str() Built-in Function Examples
#Str() Built-in Function
>>> str(6)
'6'
>>> str(7.6)
'7.6'
>>> str((6,75,9))
'(6, 75, 9)'
>>> str('cat': 'mary', 'dog': 'maggie')
"'cat': 'mary', 'dog': 'maggie'"
If you have any questions about the str() built-in function leave a comment below and we will do our best to assist you.
str()