Count Letters with a Frequency Table
Tally characters using a dict or array.
Why Count Characters
Tons of string problems boil down to one question: how often does each character appear? A frequency table answers that in one pass. 📊
The Dictionary Way
A plain dict maps each character to its count. It works for any alphabet, including unicode and symbols.
freq = {}
for ch in 'apple':
freq[ch] = freq.get(ch, 0) + 1
print(freq)All lessons in this course
- Characters, ord & chr Tricks
- Count Letters with a Frequency Table
- Palindrome Checks Done Right
- Split, Strip & Rejoin Words