Namaste Coders!
In this article, we will learn about what are identifiers and keywords in Python. Let's discuss comments in bonus section.
Keywords
Keywords are “reserved words” that convey a special meaning to the interpreter. Keywords cannot be used as a variable name in the program snippet.
It’s hard to remember all the keywords. Thus, we can get a list of all keywords by following.
Identifiers
An identifier is a name given to entities like classes, functions, variables, etc. It helps to differentiate one entity from another. Identifiers cannot be named as keywords as it will throw an error.
Rules for writing Identifiers:
- It is a combination of alphabets[a-z, A-Z] , digits[0-9] and only underscore(_) as a special symbol
- Never begin with a digit
- Do not contain spaces
- Reserved words cannot be used
- These are case-sensitive
Statements
These are the instructions that are executed by the python interpreter. For example, num=2 is an assignment statement. if statement, for statement, while statement, etc. are other kinds of statements that will be discussed later.
Multiline Statements
In Python, the end of a statement is marked by a newline character. But we can make a statement extend over multiple lines with the line continuation character ().
Comments
Comments are statements in the python program which are not interpreted i.e, these are ignored by the interpreter. Comments are used for debugging purposes. Also, it helps you to write what that particular code is performing even if a third person views the code, he also gets the idea about the program. Writing comments comes under good programming practices.
Single Line Comment
#(pound sign) is used in python for comments
Multiline Comments
“”” “”” (triple quotes) are used in python for multi line comments
The End
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