input: def digitTotal(s):
      """Task
      Implement a function that accepts a string and computes the sum of ASCII values of only the uppercase letters in the string.
  
      Examples:
          digitTotal("") => 0
          digitTotal("abAB") => 131
          digitTotal("abcCd") => 67
          digitTotal("helloE") => 69
          digitTotal("woArBld") => 131
          digitTotal("aAaaaXa") => 153
      """
output:     return sum(ord(char) for char in s if char.isupper())