Practice Set - Basic Math and String Operations

by subsari

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
function addTwoNumbers(num1, num2){
	return num1 + num2;
}
console.log(addTwoNumbers(1, 2));

// Insert your code for #2 here
function promptAndAdd(){
 var p = prompt("Please type number to increment by 1.");
 if (p != null){
 	console.log(++p);
 }
}
//promptAndAdd();


// Insert your code for #3 here
function useMathObject(){
	// console log a random number
	console.log(Math.random());
} 
useMathObject();

// Insert your code for #4 here
function promptAndUseProperty(){
	var p = prompt("Input a string to get its length.");
	if (p != null){
		console.log(p.length);
	}
}
promptAndUseProperty();