JS Notes

Comparison Operators

>     Greater than
>=    Greater than or equal to
<     Less than
<=    Less than or equal to
==    Equal to (equality operator eg "3" == 3 is true)
===   Strict equal to (strict equality operator type as well as value eg "3" == 3 is false) 
!=    Not equal to
!==   Strict not equal to

Conditional Statements

// Conditional Statements // (Bascially, "IF this is true THEN do that")

var answer = prompt('What programming language is the name of a gem?');
if () {

}

- Conditional statements begin with the "if" keyword.
- After the keyword, come a pair of parentheses ().
- Inside the parentheses goes the condition. 
    A condition is a simple trick whose answer is either true or false.
- After the condition are a set of curly braces {}.
    This is for the set of code to run IF the condition is TRUE.
    The braces form what's called a "code block" which can hold one or more JS statements.
    There is no semicolon after the last curly brace.
- An equality operator (===) checks to see if two values are the same.

eg:

if (answer === 'Ruby') {
document.write("<p>That's right!</p>");

}

Else Clause

// Else Clause (What to do if the IF is false)

var answer = prompt('What programming language is the name of a gem?');
if (answer === 'Ruby') {
  document.write("<p>That's right!</p>");
} else {
  document.write("<p>Sorry, that's wrong.</p>");
}


*****Bonus:*****
Since the answer is case sensitive, change:
if (answer === 'Ruby') {
    to
if (answer.toUpperCase() === 'RUBY') {

ya

ok

// Build a Random Number Guessing Game

var randomNumber = Math.floor(Math.random() * 6 + 1;
var guess = prompt('I am thinking of a number between 1 and 6. What is it?');
if (parseInt(guess) === randomNumber ) {
document.write('<p>You guessed the number!</p>');
} else {
document.write('<p>Sorry. The number was ' + randomNumber + '</p>');
}