Python Identifiers

What is Python Syntax?

Python syntax refers to the set of rules that defines the combinations of symbols that are considered to be correctly structured programs in the Python language. These rules make sure that programs written in Python should be structured and formatted, ensuring that the Python interpreter can understand and execute them correctly. Here are some aspects of Python syntax:...

Running Basic Python Program

There are different ways of running Python programs. Below are some most widely used and common ways to run the Python program....

Indentation in Python

Python Indentation refers to the use of whitespace (spaces or tabs) at the beginning of a line of code in Python. It is used to define the code blocks. Indentation is crucial in Python because, unlike many other programming languages that use braces “{}” to define blocks, Python uses indentation. It improves the readability of Python code, but on other hand it became difficult to rectify indentation errors. Even one extra or less space can leads to identation error....

Python Variables

Variables in Python are essentially named references pointing to objects in memory. Unlike some other languages, in Python, you don’t need to declare a variable’s type explicitly. Based on the value assigned, Python will dynamically determine the type. In the below example, we create a variable ‘a’ and initialize it with interger value so, type of ‘a’ is int then we store the string value in ‘a’ it become ‘str’ type. It is called dynamic typing which means variable’s data type can change during runtime....

Python Identifiers

In Python, identifiers are the building blocks of a program. Identifiers are unique names that are assigned to variables, functions, classes, and other entities. They are used to uniquely identify the entity within the program. They should start with a letter (a-z, A-Z) or an underscore “_” and can be followed by letters, numbers, or underscores. In the below example “first_name” is an identifier that store string value....

Python keywords

Keywords in Python are reserved words that have special meanings. For example if, else, while, etc. They cannot be used as identifiers. Below is the list of keywords in Python....

Comments in Python

Comments in Python are statements written within the code. They are meant to explain, clarify, or give context about specific parts of the code. The purpose of comments is to explain the working of a code, they have no impact on the execution or outcome of a program....

Multiple Line Statements

Writing a long statement in a code is not feasible or readable. Writing a long single line statement in multiple lines by breaking it is more readable so, we have this feature in Python and we can break long statement into different ways such as:...

Quotation in Python

In Python, strings can be enclosed using single (‘), double (“), or triple (”’ or “””) quotes. Single and double quotes are interchangeable for defining simple strings, while triple quotes allow for the creation of multiline strings. That we have used in above example. The choice of quotation type can simplify inserting one type of quote within a string without the need for escaping, for example, using double quotes to enclose a string that contains a single quote. Below is the example of using single and double quotes....

Continuation of Statements in Python

In Python, statements are typically written on a single line. However, there are scenarios where writing a statement on multiple lines can improve readability or is required due to the length of the statement. This continuation of statements over multiple lines is supported in Python in various ways:...

String Literals in Python

String literals in Python are sequences of characters used to represent textual data. Here’s a detailed look at string literals in Python. String literals can be enclosed in single quotes (‘), double quotes (“), or triple quotes (”’ or “””)....

Command Line Arguments

In Python, command-line arguments are used to provide inputs to a script at runtime from the command line. In other words, command line arguments are the arguments that are given after the name of program in the command line shell of operating system. Using Python we can deal with these type of argument in various ways. Below are the most common ways:...

Taking Input from User in Python

The input() function in Python is used to take user input from the console. The program execution halts until the user provides input and presses “Enter”. The entered data is then returned as a string. We can also provide an optional prompt as an argument to guide the user on what to input....