Thursday, October 14, 2021

What Is The Default Data Type Of All Incoming Data In Python Programming?

Introduction

Python is one of the most popular programming languages in the world and has been regarded as one of the easiest to learn. With numerous libraries available to make our coding lives easier, Python is versatile and simple, using simple and easy-to-understand keywords and logic, it was adopted all over the world for machine learning to develop models. In this article, we will be exploring the data types, one of the fundamentals of every programming language, and discuss what the default data type of incoming data in python is. 

Data Types

For beginners, the data type is a quality or an attribute that is assigned to data that helps a system interpret the value. This type of typecasting of data helps the computer to check the compatibility of data, or determine what type of operations are allowed on a set of data. This rules out the occurrence of illegal or improbable operations on a data type. This increases the reliability of the entire programming language. 

Python-Programming

In python, the above-mentioned data types are treated as classes. Each variable assigned to a data type then becomes an object or an instance. There are different kinds of data types in Python. Let’s look at some of the most popular data types in python.

  • int 

The data type contains integers (positive or negative whole numbers). There is no limit in the length of the integer.

  • float

The data type contains all real numbers and is mainly used to represent decimal numbers. 

  • str

Unlike other programming languages, Python doesn’t have character data types. String data type contains a collection of one or more characters and is characterized by data enclosed inside single, double, or triple quotes. 

  • List

The list is an ordered sequence of data stored in a single variable. The data type is highly flexible and can contain the same or different data types in a list. The list is declared inside square brackets and each item is separated by “,”.

  • set

The data type can store multiple data types in a sequence separated by a “,”. This is extremely useful as it allows multiple data to be stored under a single variable name. Sets can be initialized using the set() or by directly assigning values enclosed in curly brackets ({data}).

  • Dictionary

Dictionary is a powerful tool in python and can store a collection of unordered data as key-value pairs. Each key is assigned a value using “:”, and every key is separated by “,”. The dictionary is also declared enclosed in curly braces({}).

Syntax:

dict={key_1:pair_1, key_2:pair_2,key_3,pair_3}

  • Tuple

A tuple is an ordered list that is immutable. We cannot edit the contents of the variable unlike lists and hence it is faster than lists. Tuples are characterized by data enclosed in parentheses (), and each item in the list is separated by “,”.

  • Boolean

The boolean data type has only two values in Python, which are True or False. This is a fundamental data type used for comparisons, testing equality and inequality, etc.

The short answer to the question is you don’t. Variables in the python programming language don’t require a declaration of data type while assigning values to a variable. Python automatically assigns a data type to the variable. Users can declare a variable name and assign any data type with the assignment operator (=). The syntax for declaration is as follows:

variable_name = assigned_value

For example:

number = 1000  #Assigning an integer value to variable
decimal_number = 1000.00   #Assigning a decimal value to the variable
my_name = “EduData”   #Assigning a string (or a character) to the variable
fruits = ["apple", "orange", "grape", "pineapple", "banana"] # Here a list is created containing multiple strings
print(type(number))
print(type(decimal_number))
print(type(my_name))
print(type(fruits))

The output of the above code:

<class 'int'>
<class 'float'>
<class 'str'>
<class 'list'>

Here, you can see that python assigned the data type for each variable. However, if we want the numbers to be assigned as string data types, there are provisions for that in Python. You can add the number inside quotes or double quotes or you can insert the integer(or float) inside a str(). The str() transforms a given data type into a string data type.

number = 1000
number_2 = "1000"
number_3 = str(1000)

The variable number is an integer whereas the other variables (number_2, number_3) are strings.

What is the default data type of the Inputs in Python?

In contrast to what we have learned so far, inputs behave a little differently than the normal assigning of a variable. Python takes in input from the user via input(). The input() temporarily stops the program till a response is initiated from the user. We can insert text inside the function in single/double quotes which will be displayed on the screen at the time of execution.

Syntax:

value = input(“Question to be displayed”)

marks = input(“Enter your marks”)
print(marks)
print(type(marks))

The program waits for the user to enter any kind of input and once it’s done, the value is stored in the variable marks. But, here’s the catch. We expect the marks to be an integer value. But, it’s not. By default, python recognizes every input by the user while executing a program as a string data type.

The input function in the in-built python library is programmed to convert all input into a string. Even if we enter an integer value, it gets converted to string data type, so users won’t be able to perform arithmetic operations on such inputs and will receive errors. The input should be converted to an integer explicitly via typecasting.

Typecasting 

Typecasting is the process of converting the variable value from one data type to another. There are two types of typecasting; explicit and implicit. 

Implicit typecasting doesn’t require user participation and is done by the program itself. This is mainly practiced to prevent data loss in the system. Explicit typecasting in python requires specific functions to be used by the user to convert one data type to another. Below given are some examples for typecasting input to desired data types. 

  • Typecasting input to integer

If the input is an integer, we can store the data as an integer data type with the help of int(). 

Once done, the variable number can be used for arithmetic operations.

For example:

number = int(input())
print(type(number))

The output of the above code will be

<class 'int'>
  • Typecasting input to float

If the input is a float value (decimal number), one can use the float() to typecast the data to a float data type. 

For example:

number = float(input())
print(type(number))

The output of the above code will be

<class ‘float’>
  • Typecasting input to string

Whether the input is an integer, or a real number, or text, it can be converted to strings via the str(). 

For example:

text = str(input())
print(type(text))

The output of the above code will be

<class ‘string’>

Conclusion

Python is a sophisticated programming language that is easy to learn. It has in-built data types such as int, float, string, and many exclusive data types such as lists and dictionaries that are very powerful and have lots of applications. Inherently, there is no need to declare a data type while assigning a value to a variable in python, unlike other programming languages. Python automatically detects and assigns suitable data types. 

In python, all inputs (even integers and real numbers) from the user during the execution are considered as a string data type by python. The string is the default data type for inputs and if the user wishes to change the data type of a variable, they have to explicitly typecast the input into the needed data type.

In this article, we have discussed the default data type of input in python. We have also covered the major data types in Python and learned how to properly assign each variable. We have also seen typecasting, its importance, and major uses in accepting other data types in python.

What Is The Default Data Type Of All Incoming Data In Python Programming?

Hi, I am Sandyagu r, a Kerala-based freelance content writer and web developer. Currently, I am doing my bachelor's degree in electrical and electronics engineering from the college of engineering Trivandrum. My interests include Data science and related fields, computer vision, financial technology, battery management systems. My skill set includes web development, literature, video editing, and photo editing.

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What Is The Default Data Type Of All Incoming Data In Python Programming?

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Hi, I am Sandyagu r, a Kerala-based freelance content writer and web developer. Currently, I am doing my bachelor's degree in electrical and electronics engineering from the college of engineering Trivandrum. My interests include Data science and related fields, computer vision, financial technology, battery management systems. My skill set includes web development, literature, video editing, and photo editing.