Introduction to Python Programming Basics

Python Basics
North Eastern Mindanao State University
College of Information Technology Education
Department of Computer Studies
JHON MARK C. PALEN
Prepared by:

Python Basics Outline
Python syntax and indentation
Variables and Data types
Input and Output in Python

Python Syntax
print(“Hello Word”)

Write a script that
will Print,
Hello World!
Exercise 1

Write a script that will Print,
FullName: John Rey Ramirez
Email: jrramirez@nemsu.edu.ph
Age: 20
Exercise 2

What is Variables?
The variable is a named storage
location that holds a value or data.
These values can change during the
execution of a program, hence the
term "variable." Variables are essential
for storing and manipulating data in
computer programs.

Variable Names
A variable can have a short name (like x and y) or a more
descriptive name (age, carname, total_volume). Rules for
Python variables:
A variable name must start with a letter or the underscore character
A variable name cannot start with a number
A variable name can only contain alpha-numeric characters and underscores (A-z, 0-9, and _ )
Variable names are case-sensitive (age, Age and AGE are three different variables)
A variable name cannot be any of the Python keywords.

What is Data types?
Data types are classifications that
specify the type of data a variable
can hold. Python provides several
built-in data types to handle
different kinds of data.

Basic Data Types
String
int
boolean
float
(Sentences, Phrases, Character): identifier = “Hello World”
(Positive & Negative Numbers): identifier = 5
(float (Decimal Numbers): identifier = 24.3424
(True or False): identifier = true

Identifiers
The name of the variable which the
user decides to choose.
Syntax:
firstName = “John”
lastName = “Doe”
(identifier = value)

Types of Comments in Python
Single-Line Comments (#)
A single-line comment starts with the # symbol. Anything after # on
the same line is ignored by Python.
Multi-Line Comments (Using """ """ or ''' ''')
Python does not have a built-in multi-line comment syntax like some
other languages, but you can use triple quotes (""" """ or ''' ''') as a
workaround.

print()
Used to display something in
the console
Syntax:
Print(variable)

What is String?
String is a sequence of character
String may contain alphabets, numbers and special
characters.
Usually string are enclosed within a single quotes and
double quotes.
String is immutable in nature
a = ‘Hello World!’ b = “Python”

Inbuilt String Functions
Python mainly contains 3 inbuilt string functions.
len()
min()
max()
Find out the lenght of characters in string.
Smallest value in a string based on ASCII values
Largest value in a string based in ASCII values
print(len("Python Programming"))
print(min("Python Programming"))
print(max("Python Programming"))

Write a script that will use
variables and Print the result,
FullName: John Rey Ramirez
Length: 16
Exercise 3

Arithmetic Operators
Used to perform mathematical operations inside our
programming language.

a = “2”
b = “2”
print(a+b)
Exercise 4

Exercise 5
a = “2”
b = 2
print(a+b)

OPERATORS SYNTAX RESULT
Subtraction x - y Difference
Addition x + y Sum
Multiplication x * y Product
Division x / y Quotient
Modulus x % y Remainder
Exponent x ** y Power
Arithmetic Operators

input()
Used to make the user input
something in the console.
Syntax:
identifier= input()
identifier= input(“Enter Firstname: ”)

Casting Variables
A Technique used to convert a datatype to another datatype
Syntax:
Convert Numbers to String
Convert String to Numbers
str(number)
int(string)
float(string)

Make a One Function Calculator
Try to create a program that will perform one of the
arithmetic operators when the user inputs 2 numbers
Sample Output:
Enter first Number: 20
Enter Second Number: 40
The result of 20 + 40 = 60

For your attention and participation
Thank You!
JHON MARK C. PALEN
Instructor I

Introduction to Python Programming Basics

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