Function returning frequency of characters Dry Run in PYTHON

Function returning frequency of characters is an interactive PYTHON dry run visualizer from the Functions programs section. Study the source code, then use the execution controls to follow each step, variable update, highlighted line, and console output.

This page provides a browser-based dry run with source-code highlighting, auto-scroll, voice narration controls, and execution output for learning the program step by step.

Function returning frequency of characters Program Code

def char_frequency(text):
    """Return dictionary of character frequencies"""
    freq = {}
    for char in text.lower():
        if char.isalpha():  # Count only letters
            freq[char] = freq.get(char, 0) + 1
    return freq

result = char_frequency("Hello World!")
print(f"Character frequencies:")
for char, count in sorted(result.items()):
    print(f"  '{char}': {count}")

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