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unit_01/w01d04/homework/js_basics.md

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+# Javascript Basics
+
+![js](http://www.mastergradeit.co.za/files/thumb/289/200)
+
+## Setup
+
+Make a folder called `js_basics` inside your homework folder. Inside `js_basics` touch an index.html and an app.js and link them together. Write all of your javascript answers in `app.js`, and test them in the Chrome console.
+
+Any non-javascript written answers can be made into a comment in your js file by putting a pound # at the beginning of the line. Alternatively, comment out written work by using `command + /` in sublime. You can select blocks of text and comment them out with this shortcut.
+
+
+## Conceptual Questions
+
+1. How do we assign a value to a variable? 
+2. How do we change the value of a variable? 
+3. How do we assign an existing variable to a new variable?
+4. How do we use a variable within an expression? 
+
+## Exercises
+
+1. Create a variable called `firstVariable`.
+  - assign it the value of a string => `"Hello World"`
+  - change the value of this variable to a number.
+  - store the value of `firstVariable` into a new variable called `secondVariable` 
+  - change the value of `secondVariable` to a string. 
+  - What is the value of `firstVariable`?
+
+2. Create a variable called `yourName` and set it equal to your name as a string.
+  - Write an expression that takes the string "Hello, my name is " and the variable `yourName` so that it returns a new string with them concatenated. 
+  *(ex: "Hello, my name is Jean Valjean")*
+  
+
+...  
+
+  
+# Javascript Primitives 
+
+## Conceptual Questions
+
+1. Name 4 different built in primitives in Javascript.
+2. What is the difference between an integer and a float?
+4. How do you create an empty array and store it in a variable?
+
+## Exercises
+
+1. Given the following array `var a = [1, 10, "Hello", true]`
+  - how do you access the 1st element in the array?
+  - Change the value of `"Hello"` to `"World"`.
+  - Check the value of `a` to make sure it updated the array. 
+  
+2. Given the following array `["Meeseeks", "Coldness", "21 Berry", "Venkman"]`
+    - What would you write to access the 3rd element of the array?
+    - Change the value of "Venkman" to "Slimer"
+    - Add a new element, "Cloud City" to the array.
+
+3. Create a string that contains quotes and store it in a variable. 
+
+4. What is the result from the expression `"World" * 5`. Why?
+
+
+# JavaScript - Primitive Methods & Properties
+
+
+## Conceptual Questions
+
+1. List at least 5 properties built into a string.
+2. List at least 2 method examples built into an array.
+
+## Exercises
+
+1. Given the following string `"The Peculiar Purple Pieman of Porcupine Peak"`
+    - How can we check the length of this string?
+ 
+
+3. Given the following array `[5,10,500,20]`
+    - using the `push` method, add the string `"Egon"` to the end of the array.
+    - using a different method, remove the string from the end of the array.
+    - using the `unshift` method, add the string `"Bob Marley"` to the beginning of the array
+    - using a different method, remove the string from the beginning of the array
+  
+  
+  ...
+    
+# Javascript - operators
+
+## Exercises
+
+
+#### 1.
+Using the provided variable definitions, replace the blanks with a mathematical or boolean operator that evaluates the expression to true. :wave:
+
+```
+  var a = 4;
+  var b = 53;
+  var c = 57;
+  var d = 16;
+  var e = 'Kevin';
+```
+
+-  a _ b;
+-  c _ d;
+-  'Name' ___ 'Name';
+-  a _ b ___ c;
+-  a _ a ___ d;
+-  e ___ 'Kevin';
+-  48 ___ '48';
+
+...
+
+
+
+