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<h3>What is an Exception?</h3>

<p>Exception are errors that occur at runtime . <br>In other words , if our program encounters an abnormal situation during it’s execution it raises an exception. <br>For example,the statement <code>a=10/0 </code> will generate an exception because Python has no way to solve division by 0

<h3>What Python does when an exception occurs?</h3>

<p>Whenever an exception occurs , Python does 2 things : <br>

1. It immediately terminates the code

<br>2. It displays the error message related to the exception in a technical way

Both the steps taken by Python cannot be considered user friendly because

Even if a statement generates exception , still other parts of the program must get a chance to run

<br>The error message must be simpler for the user to understand. <br>

<b>Example:</b>

a=int(input("Enter first no:"))

b=int(input("Enter second no:"))

c=a/b

print("Div is",c)

d=a+b

print("Sum is",d)

<b>Output:</b>

Enter first no: 10

Enter second no: 5

Div is 2.0

Sum is 15

<b>Output</b>

Enter first no: 10

Enter second no: 0

Traceback (most recent call last):

File "except1.py", line 3, in &lt;module>

c=a/b

ZeroDivisionError: division by zero

If we want our program to behave normally , even if an exception occurs , then we will have to apply Exception Handling <br>Exception handling is a mechanism which allows us to handle errors gracefully while the program is running instead of abruptly ending the program execution.

<h3>Exception Handling Keywords</h3>

Python provides 5 keywords to perform Exception Handling: <br>

<br>1.try

<br>2.except

<br>3.else

<br>4.raise

<br>5.finally

<br>We will explore exception handling in detail in our next tutorial.

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