Python Data Types

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  • Before going to discuss data types in python programming language, we need to know about few points. In python programming language, we are not going to use any built-in data types to declare a variable like in C, C++. In python, mostly we use built-in data types for type casting the variables.
  • All data values are treated as object for related classes in python programming Language and every object as an identity, value and type.
  • To determine a variable’s type in Python, you can use the type () function.
  • The value of some objects can be changed. Objects whose value can be changed are called mutable.
  • objects whose value is unchangeable are called immutable. Below is the details of Python data types

Data Types in Python:

  1. Numbers
  2. Strings
  3. List
  4. Tuple
  5. Dictionary
  6. Set

1. Numbers:

In python, majorly we can divide numbers into three types. They are,

Integers, floating point numbers and complex numbers,

  • Integer numbers represents whole numbers either negative or positive numbers
  • Floating point numbers represents fractional part either negative or positive numbers
  • To check the type of data types, enter into interpreter mode and then enter below commands one by one

2. Strings:

  • Strings are nothing but collection characters in sequence
  • Strings are immutable
  • We can write strings in python in following three ways.

Single quotes:

 If character holds in a single quotes, then we can call it as string.


Double quotes:

If character holds in a double quotes, then we can call it as string.

Triple quotes:

If character holds in triple quotes, then we can call it as string. But, this type of strings we can use for doc and for multi line comments.

Note:

Combination of double and single quotes will be accepted, but it should not start with double quote and end with single quote vice versa.


  • Normal Strings

  • Combination Strings

Special character in strings:

Escape Sequence

Meaning

\’ Single Quote
\” Double Quote
\\ Back Slash
\t Horizontal Tab
\n New line

Note:

For complete and advanced string concepts, we will discuss in upcoming tutorial.

3. Lists:

  • List is a container which holds comma-separated values i.e elements or items with in holds the square brackets []
  • Elements might be same types or combination of different types
  • We can access the elements by using the index number

We can create the empty list by using without elements

4. Tuple:

  • Tuple is a container which holds comma-separated values i.e elements or items with in holds the parenthesis (), they are immutable i.e we cannot change the content once we created
  • Elements might be same types or combination of different types
  • We can access the elements by using the index number

We can create the empty tuple by using without elements

5. Dictionary:

  • Dictionary is a container which holds comma-separated values with pair i.e elements or items with in holds the curly braces {} key: value pairs where keys and values, keys are immutable
  • To Access the objects in dictionary we can use keys, keys might be string, number and tuple
  • Elements might be same types or combination of different types
  • We can access the elements by using the keys
  • We can create an empty dictionary by using empty curly braces

Syntax:

 6. Sets:

  • A set is an unordered collection of unique elements. Basic uses of sets is to deal with set theory.
  • It supports mathematical operations like union, intersection, difference, and symmetric difference or eliminating duplicate entries.

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