What is python syntax and example?
Execute Python SyntaxAs we learned in the previous page, Python syntax can be executed by writing directly in the Command Line: Show >>> print("Hello, World!") Or by creating a python file on the server, using the .py file extension, and running it in the Command Line: C:\Users\Your Name>python myfile.py Python IndentationIndentation refers to the spaces at the beginning of a code line. Where in other programming languages the indentation in code is for readability only, the indentation in Python is very important. Python uses indentation to indicate a block of code. Python will give you an error if you skip the indentation: The number of spaces is up to you as a programmer, the most common use is four, but it has to be at least one. Example if 5 > 2: Try it Yourself » You have to use the same number of spaces in the same block of code, otherwise Python will give you an error: ExampleSyntax Error: if 5 > 2: Try it Yourself » Python VariablesIn Python, variables are created when you assign a value to it: Python has no command for declaring a variable. You will learn more about variables in the Python Variables chapter. CommentsPython has commenting capability for the purpose of in-code documentation. Comments start with a #, and Python will render the rest of the line as a comment: ExampleComments in Python: #This is a comment. Try it Yourself » Test Yourself With ExercisesExercise:Insert the missing part of the code below to output "Hello World". Start the Exercise Summary: in this tutorial, you’ll learn about the basic Python syntax so that you can get started with the Python language quickly. Whitespace and indentationIf you’ve been working in other programming languages such as Java, C#, or C/C++, you know that these languages use semicolons ( Python, however, uses whitespace and indentation to construct the code structure. The following shows a snippet of Python code:
The meaning of the code isn’t important to you now. Please pay attention to the code structure instead. At the end of each line, you don’t see any semicolon to terminate the statement. And the code uses indentation to format the code. By using indentation and whitespace to organize the code, Python code gains the following advantages:
CommentsThe comments are as important as the code because they describe why a piece of code was written. When the Python interpreter executes the code, it ignores the comments. In Python, a single line comment begins with a hash (#) symbol followed by the comment. For example:
And Python also support other kinds of comments. Continuation of statementsPython uses a newline character to separate statements. It places each statement on one line. However, a long statement can span multiple lines by using the backslash ( The
following example illustrates how to use the backslash (
IdentifiersIdentifiers are names that identify variables, functions, modules, classes, and other objects in Python. The name of an identifier needs to be a letter or underscore ( Python identifiers are case-sensitive. For example, the In addition, you cannot use Python keywords for naming identifiers. KeywordsSome words have special meanings in Python. They are called keywords. The following shows the list of keywords in Python:
Python is a growing and evolving language. So its keywords will keep increasing and changing. Python provides a special module for listing its keywords called To find the current keyword list, you use the following code:
String literalsPython uses single quotes ( The string literal need to be sourounding with the same type of quotes. For eample, if you use a single quote to start a string literal, you need to use the same single quote to end it. The following shows some examples of string literals:
Summary
Did you find this tutorial helpful ? What Is syntax with example in Python?As we learned in the previous page, Python syntax can be executed by writing directly in the Command Line: >>> print("Hello, World!") Hello, World!
What Is syntax of Python language?Python Identifiers
A Python identifier is a name used to identify a variable, function, class, module or other object. An identifier starts with a letter A to Z or a to z or an underscore (_) followed by zero or more letters, underscores and digits (0 to 9).
Is there syntax in Python?Here we'll begin to discuss the main features of Python's syntax. Syntax refers to the structure of the language (i.e., what constitutes a correctly-formed program). For the time being, we'll not focus on the semantics – the meaning of the words and symbols within the syntax – but will return to this at a later point.
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