input: Write a python function to convert camelCase string to snake_case.
  assert camelCaseToSnakeCase("thisIsExample") == "this_is_example"
  assert camelCaseToSnakeCase("convertThisString") == "convert_this_string"
  assert camelCaseToSnakeCase("anotherExampleHere") == "another_example_here"
output: def camelCaseToSnakeCase(s):
      result = []
      for char in s:
          if char.isupper():
              result.append('_')
              result.append(char.lower())
          else:
              result.append(char)
      return ''.join(result).lstrip('_')