SoloLearn

Respuestas a los miniquiz

1

• [] Los caracteres que se usan para iniciar una variable son las letras
• [] para genear una consola solo debemos poner console.log("¡JS es genial ! ");
• [] para poder formar un codigo valido solo debemos poner <script>, nombre "james"; console.log (nombre); al final el </script>.

2

• [] El resultado de intentar hacer referencia a un miembro de la matriz que no existe es indefinido
• [] ingresando var example = new Array(); creamos una matriz vacia que se pueda llenar en cualquire momento despues.
• []Array tiene la propiedad "length", porque es un objeto.

3

• [] En el objeto matematico,¿cual de los siguentes metodos se usa paracalcular la raiz? sqrt
• [] ¿cuales de estos nombres son aceptables para la variables de javaScript? _modulo y primer modulo

4

• [] para generar "js is cool!" a la consola: console.log ("¡JS es genial!");
• [] ¿Que dos palabras clave necesitamos para crear una matriz? nuevo y formacion

proyectos del curso

Trip Planner

You need to plan a road trip. You are traveling at an average speed of 40 miles an hour. Given a distance in miles as input (the code to take input is already present), output to the console the time it will take you to cover it in minutes.

Sample Input: 150

Sample Output: 225

solucion: function main() { var distance = parseInt(readLine(), 10); //tu código va aquí let resultado = distance /40 *60; console . log("", resultado ); }

proyecto 2

The Snail in the Well

The snail climbs up 7 feet each day and slips back 2 feet each night. How many days will it take the snail to get out of a well with the given depth?

Sample Input: 31

Sample Output: 6

Explanation: Let's break down the distance the snail covers each day: Day 1: 7-2=5 Day 2: 5+7-2=10 Day 3: 10+7-2=15 Day 4: 15+7-2=20 Day 5: 20+7-2=25 Day 6: 25+7=32 So, on Day 6 the snail will reach 32 feet and get out of the well at day, without slipping back that night.

solucion: function main() { var depth = parseInt(readLine(), 10); //tu código va aquí

var dia = 0;
var total = 0;
while(total<depth){
    dia = dia + 1;
    total = total + 7;
    if(total >=depth){
        console.log(dia);
        break;
    }
    total = total - 2;
}

}

proyecto 3

Currency Converter

You are making a currency converter app. Create a function called convert, which takes two parameters: the amount to convert, and the rate, and returns the resulting amount. The code to take the parameters as input and call the function is already present in the Playground. Create the function to make the code work.

Sample Input: 100 1.1

Sample Output: 110

solucion: function main() { var cantidad = parseFloat(readLine(), 10); var tasa = parseFloat(readLine(), 10);

console.log(convertir(cantidad, tasa));

} function convertir (cantidad,tasa){ return cantidad * tasa }

proyecto 4

You are working on a Contact Manager app. You have created the contact object constructor, which has two arguments, name and number. You need to add a print() method to the object, which will output the contact data to the console in the following format: name: number The given code declares two objects and calls their print() methods. Complete the code by defining the print() method for the objects.

solucion: function contact(name, number) { this.name = name; this.number = number; this.print = () =>{ console.log(this.name+": "+this.number); } }

var a = new contact("David", 12345); var b = new contact("Amy", 987654321) a.print(); b.print();

proyecto 5

Store Manager

You are working on a Store Manager program, which stores the prices in an array. You need to add functionality to increase the prices by the given amount. The increase variable is taken from user input. You need to increase all the prices in the given array by that amount and output to the console the resulting array.

solucion: function main() { var aumentar = parseInt(readLine(), 10); var precio = [98.99, 15.2, 20, 1026]; //your code goes here for (i = 0; i < precio.length; i++) { precio[i] += aumentar; }

console.log(precio);

}

proyecto 6

Words

You are making a text encryptor. It should take multiple words and output a combined version, where each word is separated by a dollar sign $. For example, for the words "hello", "how", "are", "you", the output should be "$hello$how$are$you$". The given code declares a class named Add, with a constructor that takes one rest parameter. Complete the code by adding a print() method to the class, which should generate the requested output.

solucion: class Add { constructor(...words) { this.words = words; } //your code goes here print(){ let z=""; for(x of this.words){ z=z+"$"+x; } console.log(z + "$");

} }

var x = new Add("hehe", "hoho", "haha", "hihi", "huhu"); var y = new Add("this", "is", "awesome"); var z = new Add("lorem", "ipsum", "dolor", "sit", "amet", "consectetur", "adipiscing", "elit"); x.print(); y.print(); z.print();