Character Frequency in Python
A frequency dictionary provides direct access to every character count.
What is Character Frequency?
A frequency dictionary provides direct access to every character count.
Count how often each character occurs.
When should you use it?
- Learn Python syntax through a practical example.
- Build a foundation for larger programming problems.
- Test an idea quickly without a local setup.
Example code
main.py
from collections import Counter
# Counter maps each character to its occurrence count.
frequencies = Counter("banana")
for character in sorted(frequencies):
print(f"{character}={frequencies[character]}")Expected output
a=3
b=1
n=2How it works
Counter builds the frequency table in one traversal.
Change the values and run the program in the CodeUtility online Python compiler without installing Python locally.
Practice exercises
Modify the runnable example with the exercises below to build understanding beyond copying the result.
- Change the input and predict the output before running.
- Handle empty or invalid input.
- Wrap the logic in a function and add more test cases.