Exception Handling in Python

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Syntax errors (also called parsing errors) occur when we don't follow the rules of Python programming language while writing code. They are detected before program execution begins. The interpreter di…

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An exception is a Python object that represents an error that occurs during program execution, even when the code is syntactically correct. Examples include division by zero, opening a non-existent fi…

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ZeroDivisionError is a built-in exception that occurs when attempting to divide a number by zero. Example: 10/0 or x/y where y=0. This is mathematically undefined, so Python raises this exception to p…

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ValueError occurs when a function receives an argument with the correct data type but inappropriate value. Example: int('hello') - 'hello' is a string (correct type for int() function) but cannot be c…

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IndexError occurs when trying to access a list, tuple, or string element using an index that is out of range. Example: list1 = [1,2,3] and accessing list1[5] will raise IndexError because index 5 does…

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raise exception-name[(optional argument)] Example: raise ValueError('Invalid input provided') The optional argument is usually a string message displayed when the exception occurs.

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The raise statement is used to forcefully throw an exception in a program. When executed, it interrupts normal program flow and jumps to the exception handler. No further statements in the current blo…

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assert Expression[, arguments] Example: assert (number >= 0), 'Number must be positive' If the expression evaluates to False, AssertionError is raised with the optional message.