Python Comment | Python Indentation | Python Statement
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1. Python Comment, Python Indentation and Python Statement
Now that we’re getting used to Python and its ways, we think it is time to sharpen python syntax in our brains. In this tutorial, we will revise basic syntax- Python Comment, Python indentation, and a Python statement with their sub types, syntax and examples.
So, let’s start learning Python Comment, Python Indentation, and Python Statement.
2. Python Statement
The Python interpreter deals with statements. Through our journey, we have seen the conditional statements in python like ‘if’, ‘for’, ‘while’, and so on. The following is a Python statement.
a. Multiline Python Statement
In Python, every statement ends with a newline character. But like we have seen, it is possible to span a statement over multiple lines. We do this using the ‘\’ character.
>>> a=\ 10\ +20 >>> a
>>> "Hello\ hi"
But you can also use a set of parentheses for this.
>>> a=( 10+ 20) >>> a
>>> type(a) <class 'int'>
b. Multiple Python Statement in One Line
You can easily put multiple statements in python on one line.
>>> a=7; print(a)
You can also do this to an if-statement.
>>> if 2>1: print("2")
c. Strings Python Statements
To declare strings in python, you may use single or double quotes.
>>> "Hello 'user'"
If you use double quotes outside, use single quotes wherever you need to use a quote inside.
d. Blank Lines Python Statements
The interpreter simply ignores blank lines.
3. Python Indentation
Unlike C++ or Java, Python does not use curly braces for indentation. Instead, Python mandates indentation. At this point, our inner monsters are laughing at the lazy programmers around us.
>>> if 2>1: print("2")
There are no strict rules on what kind of Python indentation you use. But it must be consistent throughout the block. Although, four whitespaces are usually preferred, and tabs are discouraged. Let’s take an example with an inconsistent indentation in python.
>>> if 2>1: print("1") print("2")
SyntaxError: unexpected indent
4. Python Comment
Python Comment is a programmer’s tool. We use them to explain the code, and the interpreter ignores them. You never know when a programmer may have to understand code written by another and make changes to it. Other times, give your brain a month’s time, and it might forget what it once had conjured up in your code. For these purposes, good code will hold comments in the right places.
In C++, we have // for single-lined comments, and /* … */ for multiple-lined comments. Here, we only have single-lined python comment.
To declare a Python comment, use the octothorpe (hash) (#).
>>> #This is a comment >>>
a. Multiline Python Comment
To have multiline python comment in your code, you must use a hash at the beginning of every line of your comment in python.
>>> #Line 1 of comment >>> #Line 2 of comment >>> #Line 3 of comment
You can also use triple quotes (‘’’ ‘’’ or “”” “””) for this purpose.
>>> """This comment is spanned across multiple lines"""
‘This comment\nis spanned across\nmultiple lines’
This gives us an output because we type it in the shell. When you create a file and write this in that, there is no output. While triple quotes are generally used for multiline python comment, we can conveniently use them for python comment as well.
Triple quotes will also preserve formatting.
>>> print("""Hello Hi""")
Read: Python Functions with Syntax and Examples
b. Docstrings Python Comment
>>> def sayhi(): """ This function prints Hi """ print("Hi") >>> sayhi()
To check a function’s docstring, use its __doc__ attribute.
>>> def sayhi(): """ This function prints Hi """ print("Hi") >>> sayhi.__doc__
‘\n\tThis function prints Hi\n\t’
The interpreter is unable to get the docstring to a function if it isn’t the first thing in the python function.
>>> def sayhi(): print("Hi") """ This function prints Hi """ >>> sayhi.__doc__ >>>
So, this was all about Python indentation, comment and statement. Hope you like our explanation.
5. Python Comment – Conclusion
Hope we’ve reconnected you to some basics python Syntax- Python indentation, comments and statement. Don’t forget to try out your own combinations. If you don’t get something in Python indentation, Comment and statement ask us in the comments.
Advantages and Disadvantages of Python.