Python Coding challenge - Day 360| What is the output of the following Python Code?

 

Code Explanation:

from collections import defaultdict

This imports defaultdict from Python’s collections module.

defaultdict is a specialized dictionary that provides default values for non-existent keys instead of raising a KeyError.

d = defaultdict(int)

Creates a defaultdict where the default value for missing keys is determined by int().

int() returns 0, so any key that doesn't exist will automatically have a default value of 0.

d["a"] += 1

Since "a" is not yet in d, defaultdict automatically initializes it with int(), which is 0.

Then, += 1 increments its value from 0 to 1.

print(d["a"])

Prints the value of "a", which is now 1.

Final Output:

1