Exercise - Control flow

by Vijay Venkatan

JavaScript

/**
 * Exercise:
 *
 * Get to know your control flow and iteration
 *
 * Work in the console, or use "console.log()" to output to the console from the script
 *
 * these browser based functions can be used
 *     alert("Message string"); // will alert a message to the user
 *     var val = prompt("Question string?"); // will prompt the user for a value and return the value
 *     confirm("Message string"); // will ask the user to confirm with an ok, or cancel, returning a boolean
 */

// 1)
// Ask the user for a number
// Tell (alert) the user if it is even or odd.
// (hint: prompt() will always return a string)
var val = prompt("Please enter a number to check if it is a even or odd");
if(isNaN(val))
{
    alert(val + " is not a number");
}
else
{
    if(val%2 == 0)
    {
        alert(val + " is even");
    }
    else
    {
        alert(val + " is odd");
    }
}
// 2)
// Ask the user how old they are
// If they are 70 or older, tell them they look great.
// If they are 18 or younger, tell them they should be in school.
// If they are between those ages, tell them to get a job.
var age = prompt("How old are you");
if(isNaN(age))
{
    alert(val + " is not a valid age");
}
else
{
    if(age>=70)
    {
        alert("You look great");
    }
    else if(age<=18)
    {
        alert("You should be in school");
    }
    else if(age>18 && age<70)
    {
        alert("You should get a job");
    }
}
// 3) 
// We have an array of values
// Use a while() statement to go through each value of the array
// and add 1 to each number (but not strings)
// log the resulting array to the console

var myArray = [1,2,3,"Interlocutor", 4,5,6];


// 4)
// Make an array of people's names
// Use a for statement to go through each and combine
// them into a single string separated by commas
// Log the result to the console.
// ex result: "John, Sally, Nick"