Counting Letter Frequency in a String (Python)

Question

I am trying to count the occurrences of each letter of a word

word = input(\"Enter a word\")

Alphabet=[\'a\',\'b\',\'c\',\'d\',\'e\',\'f\',\'g\',\'h\',\'i\'         


        

Answer 1

If using libraries or built-in functions is to be avoided then the following code may help:

s = "aaabbc"  # sample string
dict_counter = {}  # empty dict for holding characters as keys and count as values
for char in s:  # traversing the whole string character by character
    if not dict_counter or char not in dict_counter.keys():  # Checking whether the dict is
        # empty or contains the character
        dict_counter.update({char: 1})  # if not then adding the character to dict with count = 1
    elif char in dict_counter.keys():  # if the char is already in the dict then update count
        dict_counter[char] += 1
for key, val in dict_counter.items(): # Looping over each key and value pair for printing
    print(key, val)

Output:
a 3
b 2
c 1