Application: Character Classification

This lesson shows a possible solution for the exercise P42042 (Character Classification 1) from the Judge.

Exercise P42042

Exercise P42042 asks you to write a program that reads a letter and indicates whether it is uppercase, whether it is lowercase, whether it is a vowel, and whether it is a consonant.

This is a possible solution:

python

from yogi import read

lletra = read(str)

majuscula = lletra >= 'A' and lletra <= 'Z'

vocal = lletra == 'a' or lletra == 'e' or lletra == 'i' or lletra == 'o' or lletra == 'u' or lletra == 'A' or lletra == 'E' or lletra == 'I' or lletra == 'O' or lletra == 'U'

if majuscula:
    print("majuscula")
else:
    print("minuscula")

if vocal:
    print("vocal")
else
    print("consonant")

First, we read the letter from the input into a variable lletra of text type. Since, according to the statement, it is a letter (uppercase or lowercase), there is no need to check it.

Next, we save in a boolean variable majuscula whether or not lletra is an uppercase letter, checking that lletra is between 'A' and 'Z'.

Then, we save in a boolean variable vocal whether or not lletra is a vowel. To check this, we verify if lletra is one of the five possible vowels, both uppercase and lowercase. Since the line was getting very long, it has been separated into two lines.

Finally, we use the two booleans to write the appropriate messages to the screen.

A possible way to simplify the program is to make use of Python's in operator, which when applied to two texts returns a boolean that says whether or not the first text is within the second. Then, determining whether lletra is a vowel could be done with

vocal = lletra in 'AEIOUaeiou'

Application: Character Classification ​

Exercise P42042 ​

Application: Character Classification

Exercise P42042