Skip to content

Latest commit

 

History

History
 
 

day-02

Folders and files

NameName
Last commit message
Last commit date

parent directory

..
README.md
README.md
 
 
day-2-input.py
day-2-input.py
 
 
day-2.py
day-2.py
 
 

README.md

Day 2: Basic Data Types and User Inputs

Data Types

Let's start your Day 2 of Backend Development with the introduction to Basic Data Types.

❓ What is a Data Type?

  • You can think of data type as an attribute, or as the name suggests, a type, associated with the data being used within our program, and it tells the compiler or interpreter how its value should be treated.

👀 Common Data Types

There are various data types present in different programming languages, but here are the most basic forms of data types that you should be aware of:

Integer

  • often shortened as int, it is a data type representing any whole numbers.

To have a variable with integer data type in Python, initialize it with any integer value:

my_int = 10

You may remember that Python has type inference, so you don't need to specify its data type when declaring any variables.

Float

  • represents numbers with floating point.

To have a variable with data type in Python:

my_float = 1.23

Character

  • often shortened as char, it represents a single character.

Although Python doesn't have a character data type, instead, it uses a data type called string.

String

  • often shortened as str, it represents a sequence of characters. You may declare a string enclosed in single, double, or triple quotes.
my_str = 'Hello, AWSCC!'
my_str1 = "Hello, DSWD!"
my_str2 = '''Hello, Backend!'''

Boolean

  • often shortened as bool, it represents the two Boolean values: True or False. This can be very useful for logical operations and conditions.
my_bool = True
your_bool = False

Null Type

  • a special kind of data type that only represents a single value: None. This is used when a variable does not contain any value.
null = None

User Inputs

You learned in Day 1 that we can print an output simply by using print(). This time, let's learn how to take an input from the user.

To take an input from the user, you can simply use (and you might have guessed it already) input().

Here's a simple Python code that uses input() to ask the user their age and store it in the age variable.

age = input("Enter your age: ")
print(f"You're {age} years old.")

You can try running it in day-2-input.py inside this folder.

CHALLENGE TIME!!!

Since you are now familiarized with the basic data types and the input() function, it's time for you to take on some challenges:

Write a Python program that prompts the user to enter three integer values and then calculates and displays their sum.

The output may look like this:

Enter the first number: 5
Enter the second number: 19
Enter the third number: 11

Sum: 35

Additional Resources