How Python evaluates if statements #
In Python, if-elif-else statements are evaluated in order from top to bottom. This means that the first condition that evaluates to True will be executed, and subsequent conditions will be ignored.
It's important to order the conditions correctly to ensure that the correct block of code is executed. If two or more conditions could be True for a given input, only the first matching condition will be executed.
Here's an example of incorrect ordering in Python if-elif statements:
x = 5
if x < 10:
print("x is less than 10")
elif x < 7:
print("x is less than 7")
else:
print("x is greater than or equal to 10")
In this example, the ordering of the elif statements is incorrect. The elif condition x < 7 will never be reached, because any value of x that satisfies that condition will have already been caught by the previous elif condition x < 10. As a result, the output of this code for x = 5 will be "x is less than 10", even though x is less than 7.
To correct the ordering, the elif conditions should be reordered so that the most specific condition comes first:
x = 5
if x < 7:
print("x is less than 7")
elif x < 10:
print("x is less than 10")
else:
print("x is greater than or equal to 10")
Exercise #
- Fix the order of the if statement in the function
get_spicy_messageso that it returns the correct value.
Tests #
get_spicy_message(3)should return"Not spicy".get_spicy_message(4)should return"Little spicy".get_spicy_message(5)should return"Very spicy".get_spicy_message(6)should return"Very spicy".
Getting Started with Python
Data Types
Python Functions
Statements in Python
Basic Debugging in Python
Basic Algorithm
Object-Oriented Programming
Error Handling
Intermediate Algorithm
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