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An identifier in Python is a name used to identify variables, functions, classes, or other objects. It must follow specific rules, such as starting with a letter or underscore and avoiding reserved keywords.
Example: Creating and Printing an Identifier
# Creating a valid Python identifiermy_variable = 42# Printing the value of the identifierprint(my_variable)Copied!âś•CopyOutput:
42Copied!âś•CopyKey Rules for Identifiers:
Must start with a letter (A-Z or a-z) or an underscore (_).
Cannot start with a digit.
Can only contain alphanumeric characters and underscores.
Cannot use Python reserved keywords like if, else, for, etc.
Important Considerations:
Identifiers are case-sensitive (my_variable and My_Variable are different).
Use meaningful names for better readability, e.g., age instead of a.
Avoid starting identifiers with underscores unless necessary (e.g., _private_var).
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