Average - Intro to Java ProgrammingYouTube↗  IA↗(long shot)
Education  1.5K views 6 likes 3 dislikes   23 Feb 2015
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We want to figure out what the sum of all of the numbers that are entered is.
Queremos resolver la suma de todos los números que se han ingresado.
And also what the count is. So, we can use them to calculate the average and
Y también cuál es el conteo. Para poder utilizarlas para calcular el promedio y
return it. We can use a do loop to collect the user input. Somewhere in the do
devolverlo. Podemos utilizar un «bucle do» para recolectar la entrada del usuario. En algún lugar del «bucle do»
loop we'll have to update value by getting the next user input. So, we'll need
tendremos que actualizar el valor mediante la obtención de la próxima entrada del usuario. Bien, vamos a tener que
to ask the user for a double, and then read in the next double using the
pedirle al usuario un doble, y luego leer en el siguiente doble utilizando el
scanner. If the value is 0, then we want to quit, but if it's not, we want to
escáner. Si el valor es 0, entonces queremos salir, pero si no, queremos
increment count and add to the sum. So, count goes up, and sum goes up. So, how
incrementar el contador y añadir a la suma. Bien, el conteo sube y la suma sube. Entonces, ¿cuánto tiempo
long do we want to keep going? We want to keep going as long as value is not 0.
queremos continuar? Queremos continuar mientras el valor no sea 0.
Because if value is 0, that means we read a 0 from the user. So, we continue
Porque si el valor es 0, significa que leemos un 0 por parte del usuario. Bien, continuamos
doing these steps, as long as value is not 0. Let's try this, after I fix up my
con estos pasos mientras el valor no sea 0. Vamos a intentar esto, después de corregir mis
syntax errors. Running the main method. If I enter 2, it doesn't quit. Negative
errores de sintaxis. Ejecución del método principal. Si escribo 2, no finaliza. Negativo
3, it doesn't quit. 0, it stops. And it gives me an average. Let's look at the
3, no finaliza. 0, se detiene. Me da un promedio. Veamos el
program again though. There's some repetition here. We have to check that the
programa otra vez. Hay cierta repetición aquí. Tenemos que revisar que el
value is not equal to 0 in two different places. We could change this so
valor no sea igual a 0 en dos lugares diferentes. Podríamos cambiar esto para
instead of using a do while loop it would just use a while loop and only check
que en lugar de usar un «bucle do while», solo utilizaría un «bucle while» y solo revisar que
the value as not equal to 0 in one place. We would declare a Boolean to track
el valor no sea igual a 0 en un lugar. Declararíamos un booleano para monitorear
whether we're done or not yet. Initially, we're not done. So, it starts as
si ya terminamos o todavía no. Inicialmente, no hemos terminado. Bien, comienza como
false. Then, as long as we're not done, we would keep doing the things in the
falso. Entonces, mientras no hayamos terminado, tendríamos que seguir haciendo las cosas en el
loop. So, we wouldn't need the while at the bottom. As is, this loop would go
bucle. Por lo que no necesitaríamos el «while» en la parte inferior. Como es, este bucle iría
forever because we never change the value of done. So, when do we want to say
por siempre porque nunca cambiamos el valor de finalizado. Bien, ¿Cuándo queremos decir
that we're done? Well, we want to say that we're done if somebody puts in a 0.
que terminamos? Bueno, queremos decir que hemos terminado si alguien escribe un 0.
So, if the value is 0, then we set done to true. This will work the same way.
Por lo tanto, si el valor es 0, entonces cambiamos finalizado a verdadero. Esto funcionará de la misma manera.
When I run the main method, it'll ask for doubles until I enter 0, and then
Cuando ejecuto el método principal, va a pedir dobles hasta que escribo 0, después
give the average. You can structure any loop and a half this way using a
da el promedio. Puedes estructurar cualquier bucle y una mitad de esta manera utilizando un
Boolean to guard your condition.
booleano para proteger tu condición.
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