Python Coding challenge - Day 1184| What is the output of the following Python Code?

 

Code Explanation:

🔹 1. Importing Counter

from collections import Counter

✅ Explanation:

Counter is imported from Python's collections module.

It is used to count the frequency of elements.

It behaves like a dictionary where:

Key   → Element

Value → Count

Example:

Counter("aab")

Creates:

{'a': 2, 'b': 1}

🔹 2. Creating a Counter Object

c = Counter("abc")

✅ Explanation:

Python reads each character of:

"abc"

Characters:

a

b

c

Count of each character:

{

    'a': 1,

    'b': 1,

    'c': 1

}

Current state:

c

↓

Counter({

    'a':1,

    'b':1,

    'c':1

})

🔹 3. Updating the Counter

c.update("aba")

✅ Explanation:

update() adds counts to existing values.

String:

"aba"

Characters:

a

b

a

Frequency of update string:

{

    'a': 2,

    'b': 1

}

🔹 4. Updating Count of 'a'

Before update:

'a': 1

New occurrences:

'a': 2

Calculation:

1 + 2 = 3

New value:

'a': 3

🔹 5. Updating Count of 'b'

Before update:

'b': 1

New occurrences:

'b': 1

Calculation:

1 + 1 = 2

New value:

'b': 2

🔹 6. Count of 'c'

Character:

'c'

does not appear in:

"aba"

So its count remains:

'c': 1

🔹 7. Final Counter State

After update:

Counter({

    'a': 3,

    'b': 2,

    'c': 1

})

Visual:

a → 3

b → 2

c → 1

🔹 8. Printing Count of 'a'

print(c["a"])

✅ Explanation:

Python looks up:

c["a"]

Value:

3

Output:

3

🔹 9. Printing Count of 'b'

print(c["b"])

✅ Explanation:

Python looks up:

c["b"]

Value:

2

Output:

2

🎯 Final Output

3

2

Book: 100 Python Programs for Beginner with explanation