how to count how many times a letter appears in a string python code example

Example 1: python count how many times a character appears in a string

string.count('a')

Example 2: count characters in string python

>>> sentence = 'Mary had a little lamb'
>>> sentence.count('a')
4

Example 3: check how many letters in a string python

#use the built in function len()

len("hello")

#or you can count the characters in a string variable

a = "word"
len(a)