Practice Set - Basic Math and String Operations

by Alexis Rodriguez

HTML

<h3>Basic Math and String Operations</h3>
<h4>4 Tasks for this Practice Set:</h4>
<ol>
    <li>
        Write a script to add two numbers and output the sum to the console</li><li>
    Write a script that prompts for input, adds one to whatever number was input and outputs the sum to the console. Use the increment operator.  Assume that the input will be a number (no type-checking is required for this exercise).
    </li><li>
    Look up the Math object, and use one of its methods to do <i>something</i> to a number and output the result to the console (you pick: square it, round a decimal number up or down, do a trig function...whatever) Make sure the you comment your code or use console output to describe what you’re doing.
</li><li>
    Prompt for input and assign the result to a variable. Then, look up the String object, and use one of its properties to output the length of the string variable to the console.
    </li>
</ol>

JavaScript

// Insert your code for #1 here
var sum = 3 + 5;
console.log(sum);

// Insert your code for #2 here
var halloween = prompt ("How many days until Halloween?");
console.log("the variable 'halloween' is of type" +typeof halloween);

halloween = Number(halloween);
console.log("After Number() the variable 'halloween' is of type" +typeof halloween);

halloween = halloween+1
console.log("The amount of days until All Souls Day, then, is" + halloween);


// Insert your code for #3 here
var x = Math.sqrt(169); //I'm attempting to tell Java to find the square root of 169 which is 13
console.log(x);


// Insert your code for #4 here
var str = prompt ("Type a word here!");
var n = str.length;
console.log(n); //I'm attempting to have someone put any word into the prompt and the Java will tell the length of that word using the string length property