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Example:
a=10
a=20
Initially, the value of variable ‘a’ was 10. Later it’s
changed to 20.
Python Keywords
Python has a set of keywords that are reserved words and has a special meaning. They cannot be used
as variable names, function names, or any other identifiers. Some of the keywords are as follows:
False class finally is return
None continue for lambda try
True def from nonlocal while
and del global not with
as elif if or yield
assert else import pass raise
break except in
Comments in Python
In Python, comments are used to explain code and are ignored by the interpreter. There are two
types of comments:
l Single-line comments: Use the # symbol. Everything after # on the same line is considered a
comment.
Example:
#This is a single-line comment
l Multi-line comments: Use triple quotes (''' or """) for block comments.
Example:
' ' '
This is a multi-line comment.
It spans multiple lines.
' ' '
Python Operators
Operators are special symbols in Python that carry out arithmetic or logical computation. The value
that gets operated on is called an ‘Operand’. For example: 2+3=5, here, 2 and 3 are ‘Operands’. The
symbol ‘+’ is known as the ‘Operator’.
Basics of Python 113

