Update cheat-sheet.md

Author: Tanya Butenko

cheat-sheet.md

@@ -1,96 +1,120 @@
 # JavaScript Cheatsheet
 
 
-**JavaScript (or JS)**
+###JavaScript (or JS)
+
 It is a popular programming language commonly used to create interactive effects within web browsers
 
 
-**variable**
+###variable
+
 A place to store values, can store any kind of information(data types): numbers, words, collections of data
 
 
-**undefined variable**
+###undefined variable
+
 A variable that has no value
 
-**to declare variable**
+###to declare variable
+
 To create a variable  - done by using ‘ var variable-name = value ’
 
 
-**to initialize variable**
+###to initialize variable
+
 Set (give) some value to variable.
 
-**string**
+###string
+
 A set of characters, word, phrase. To initialize variable with a string you need to put this string into quotes.
 
-**boolean**
+###boolean
+
 Boolean variable represent a logical values True or False
 
 
-**array**
+###array
+
 An ordered list of values, can store different type of data inside
 
 
-**operator**
+###operator
+
 Mathematical operators, such as: +, -, *, /, >, <, = etc
 
 
-**comments**
+###comments
+
 Comments are some notes that you can leave for yourself or another person, the note that computer will not read. You can write a comment on a new line or on the same line after code as so:  //I’m your comment
 Single line comment starts with //
 Multi line comment are placed between /* .. */ 
 
 
-**function**
+###function
+
 A separable, reusable piece of code. It takes some input do some manipulation on it and return us output
 
 
-**to declare function**
+###to declare function
+
 To create a function
 
-**argument**
+###argument
+
 A value input that functions can accept
 
 
-**if/else statement**
+###if/else statement
+
 ‘If’ used to decide which lines of code to execute, ‘else’ - to give alternative set of instructions. Example: if(x > 5) {console.log”X bigger than 5”}; else {console.log”X smaller than 5”};
 
 
-**while loop**
+###while loop
+
 It repeats code over and over again until some condition is met
 
 
-**for loop**
+###for loop
+
 This loop is similar to ‘while loop’, just with set amount of repetition. You declare counter in the statement as so: for(var i = 0; i < 5; i++){do something 5 times};
 
 
-**infinite loop**
+###infinite loop
+
 A loop that does not stop and it’s a  loop that you need to avoid. Each loop should have some condition so it can stop.
 
 
-**object**
+###object
+
 A collection of properties
 
 
-**event**
+###event
+
 A type of object that is created when user interacts with web page. For example, JavaScript creates an event when user clicks on a button.
 
 
-**CSS**
+###CSS
+
 Stands for Cascading Style Sheets. CSS describes how HTML elements are to be displayed on screen. It is presentation.
 
 
-**HTML**
+###HTML
+
 Stands for Hyper Text Markup Language. It is a structure of the elements on the page.
 
 
-**DOM**
+###DOM
+
 Stands for Document Object Model. It defines the logical structure of documents and the way a document is accessed and manipulated.
 
 
-**scope**
+###scope
+
 Scope is the set of variables, objects, and functions that you can access 
 
 
-**console**
+###console
+
  A method of interacting with the system. In order to write to the browser console, you could use console.log(‘Hello World’). This would write Hello World in the browser console.