completed homework 1

README.md

@@ -4,11 +4,16 @@
 ---
 1. Feynman Writing Prompts - Write out explanations of the following concepts like you are explaining it to a 12 year old.  Doing this will help you quickly discover any holes in your understanding.  Ask your questions on Slack.
 
-	* Variables
-	* Strings
-	* Functions (arguments, `return`)
-	* `if` statements
-	* Boolean values (`true`, `false`)
+	* Variables  --- Variables are data types used for storing data values.  For example:  var foo = 1;   The value, the number 1, is now stored in the variable 'foo' and this value can be accessed in a program by referring to 'foo'.
+
+	* Strings --- A string stores a series of characters and is used for storing and manipulating text.
+
+	* Functions (arguments, `return`)   ---   A function is a block of code that is used to perform a particular action. 
+
+	* `if` statements   --- If statements are a block of code that checks if a particular condition is true and if so, performs and action.
+
+
+	* Boolean values (`true`, `false`)  --- Boolean values are a data type that only evaluates to true or false.  
 
 
 2. Install Node and NPM.  NPM comes packaged with Node. https://nodejs.org/en/download/

exercises.js

@@ -3,137 +3,213 @@
 function multiplyByTen(num) {
   // return num after multiplying it by ten
   // code here
+  var timesTen = num * 10;
+  return timesTen;
 }
 
 function subtractFive(num) {
   // return num after subtracting five
   // code here
+  var minusFive = num - 5;
+  return minusFive;
 }
 
 function areSameLength(str1, str2) {
   // return true if the two strings have the same length
   // otherwise return false
   // code here
+  if (str1.length == str2.length) {
+    return true;
+  }
+  else {
+    return false;
+  }
 }
 
 function areEqual(x, y) {
   // return true if x and y are the same
   // otherwise return false
   // code here
+  if (x === y){
+    return true;    
+  }
+  else {
+    return false;
+  }
 }
 
 function lessThanNinety(num) {
   // return true if num is less than ninety
   // otherwise return false
   // code here
+  if (num < 90){
+    return true;
+  }
+  else {
+    return false;
+  }
 }
 
 function greaterThanFifty(num) {
   // return true if num is greater than fifty
   // otherwise return false
   // code here
+  if (num > 50) {
+    return true;
+  }
+  else {
+    return false;
+  }
 }
 
 function add(x, y) {
   // add x and y together and return the value
   // code here
+  var sum = x + y;
+  return sum;
 }
 
 function subtract(x, y) {
   // subtract y from x and return the value
   // code here
+  var diff = x - y;
+  return diff;
 }
 
 function divide(x, y) {
   // divide x by y and return the value
   // code here
+  var divided = x / y;
+  return divided;
 }
 
 function multiply(x, y) {
   // multiply x by y and return the value
   // code here
+  var multiple = x * y;
+  return multiple;
 }
 
 function getRemainder(x, y) {
   // return the remainder from dividing x by y
   // code here
+  var remainder = x % y;
+  return remainder;
 }
 
 function isEven(num) {
   // return true if num is even
   // otherwise return false
   // code here
+  if (num % 2 == 0) {
+    return true;
+  }
+  else {
+    return false;
+  }
 }
 
 function isOdd(num) {
   // return true if num is false
   // otherwise return false
   // code here
+  if (num % 2 != 0) {
+    return true;
+  }
+  else {
+    return false;
+  }
 }
 
 function square(num) {
   // square num and return the new value
   // code here
+  var squared = Math.pow(num, 2);
+  return squared;
 }
 
 function cube(num) {
   // cube num and return the new value
   // code here
+  var cubed = Math.pow(num, 3);
+  return cubed;
 }
 
 function raiseToPower(num, exponent) {
   // raise num to whatever power is passed in as exponent
   // code here
+  var raised = Math.pow(num, exponent);
+  return raised;
 }
 
 function roundNumber(num) {
   // round num and return it
   // code here
+  var round = Math.round(num);
+  return round;
 }
 
 function roundUp(num) {
   // round num up and return it
   // code here
+  var roundedUp = Math.ceil(num);
+  return roundedUp;
 }
 
 function addExclamationPoint(str) {
   // add an exclamation point to the end of str and return the new string
   // 'hello world' -> 'hello world!'
   // code here
+  var concat = str + '!';
+  return concat;
 }
 
 function combineNames(firstName, lastName) {
   // return firstName and lastName combined as one string and separated by a space.
   // 'Lambda', 'School' -> 'Lambda School'
   // code here
+  var combined = firstName + ' ' + lastName;
+  return combined;
 }
 
 function getGreeting(name) {
   // Take the name string and concatenate other strings onto it so it takes the following form:
   // 'Sam' -> 'Hello Sam!'
   // code here
+  var greeting = 'Hello ' + name + '!';
+  return greeting;
 }
 
 // If you can't remember these area formulas then head over to Google or look at the test code.
 
 function getRectangleArea(length, width) {
   // return the area of the rectangle by using length and width
   // code here
+  var area = length * width;
+  return area;
 }
 
 function getTriangleArea(base, height) {
   // return the area of the triangle by using base and height
   // code here
+  var multiple = base * height;
+  var area = multiple / 2;
+  return area;
 }
 
 function getCircleArea(radius) {
   // return the rounded area of the circle given the radius
   // code here
+  var rad = Math.pow(radius, 2);
+  var result = Math.round(Math.PI * rad);
+  return result;
 }
 
 function getRectangularPrismVolume(length, width, height) {
   // return the volume of the 3D rectangular prism given the length, width, and height
   // code here
+  var volume = length * width * height;
+  return volume;
 }
 
 // Do not modify code below this line.