April 27, 2026 - Examples of runtime errors in Python include ZeroDivisionError, NameError, TypeError, and ValueError. Let’s discuss the different runtime errors, their causes, and ways to avoid them.

Learn about built-in error types in Python such as IndexError, NameError, KeyError, ImportError, etc.

Exceptions come in different types, and the type is printed as part of the message: the types in the example are ZeroDivisionError, NameError and TypeError. The string printed as the exception type is the name of the built-in exception that occurred.

Dividing any number by zero is mathematically undefined and results in a runtime error. ... OverflowError occurs when a numerical operation results in a number too large to be represented within Python’s numeric limits (mostly for floating-point numbers). Example with the math module’s ...

January 3, 2025 - TypeError: Raised when an operation or function is applied to an object of inappropriate type. IndexError: Raised when trying to access an index that is out of range in a list or tuple.

AS shown in the examples above, there are different types of built-in exceptions: ZeroDivisionError, TypeError, and NameError. You can find a complete list of built-in exceptions in the Python documentation. Of course, you can define your own exception types, but we will not deal with this ...

Passing arguments of the wrong type (e.g. passing a list when an int is expected) should result in a TypeError, but passing arguments with the wrong value (e.g. a number outside expected boundaries) should result in a ValueError. ... Raised when a reference is made to a local variable in a function or method, but no value has been bound to that variable. This is a subclass of NameError. ... Raised when a Unicode-related encoding or decoding error occurs.

The table below shows built-in exceptions that are usually raised in Python.

August 7, 2025 - So, the attempt to use ‘numbers’ as a function instead of an indexable list would result in a type error. In Python, a ValueError is raised when a built-in operation or function receives an argument that has the right type but an inappropriate value. You can get a ValueError in various scenarios, such as when you are try to convert a string to an integer, access an index that doesn’t exist in a list, or perform operations with inappropriate values for a specific function or operation. ... In this example, the ‘int()’ function is called with a string that cannot be converted to an integer, resulting in a ValueError.

July 21, 2022 - The Indentation error is another type of error in python that can be summed up inside the syntax error. As we know, we use indentation to define a block of code in python. So, in case of improper indentation, the Python interpreter raises an ...

May 29, 2026 - An IndentationError occurs when the indentation is missing or incorrect. Example: Here, the code gives an IndentationError because the statement inside the if block is not indented properly.

February 23, 2025 - Some common error types in Python are, syntax errors, logic errors, assertion errors, index error, key error, name error, type error. Error types are like clues that guide you on how to fix the problem.

November 20, 2025 - Exceptions are a general set of errors that, unlike syntax errors, appear during code execution. NameErrors and ScopeErrors are both caused by Python not being able to use a variable correctly. NameErrors occur when a variable or function is used before it has been correctly defined.

To learn more about them, visit Python try, except and finally statements. Errors represent conditions such as compilation error, syntax error, error in the logical part of the code, library incompatibility, infinite recursion, etc. Errors are usually beyond the control of the programmer and ...

February 1, 2022 - C:\Python34\Scripts>python error.py File "error.py", line 3 if x%2 == 0 ^ SyntaxError: invalid syntax · 2. Runtime errors – errors that occur after the code has been compiled and the program is running. The error of this type will cause your program to behave unexpectedly or even crash. An example of an runtime error is the division by zero.

March 20, 2025 - IndexError is one of Python’s runtime errors that manifests when code attempts to access a sequence index that exceeds its bounds. You’ll come across this error type mostly when dealing with list operations, string manipulations, and array processing when the requested index falls outside the valid range viz.

A UnicodeError exception is raised when Python encounters encoding or decoding issues. The reasons for this error include: Conflicts due to mixed encoding in the text. Incorrect byte order marks (BOM) leading to decoding errors. Use of unsupported or mismatched encoding schemes. Conflicts arising from different Unicode standards. Problems with surrogate pairs in UTF-16. Corrupted or incomplete byte sequences. Consider this example where decoding a Unicode string with ASCII results in an error:

A UnboundLocalError is a more specific type of error. It refers to the cases where the same variable name is used both inside and outside of a function. In these cases, Python will automatically use the variable inside the function. However, if the variable is called before it is defined inside the function, it will throw this error. An example ...