answered all hw 1 questions

README.md

@@ -4,11 +4,15 @@
 ---
 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 in Javascript are like boxes that hold things. You give them names, just like labeling a box of Pokémon cards, so you can find it quickly. Use good names, so you know exactly what’s inside — like ‘Ultimate Pokémon Deck')
+
+	* Strings (sequence of characters for example. John Doe)
+
+	* Functions (arguments, `return`) (Functions are like cooking recipes or the instructions that come with a LEGO set. Running a function goes through each of the steps until it reaches the end or is told to stop)
+
+	* `if` statements - runs different paths (If you are running along a side walk and there is someone you don't like there then you will take a different path home)
+
+	* Boolean values (`true`, `false`) (yes or no) (lights on of off)
 
 
 2. Install Node and NPM.  NPM comes packaged with Node. https://nodejs.org/en/download/

exercises.js

@@ -1,114 +1,155 @@
 //Do not change any of the function names
 
 function multiplyByTen(num) {
+  var product = num * 10;
+  return product;
   // return num after multiplying it by ten
   // code here
 }
 
 function subtractFive(num) {
+  var difference = num - 5;
+  return difference;
   // return num after subtracting five
   // code here
 }
 
 function areSameLength(str1, str2) {
+  if (str1.length === str2.length) {
+      return true;
+  }  return false;
+}
   // return true if the two strings have the same length
   // otherwise return false
   // code here
-}
 
 function areEqual(x, y) {
+  if (x === y) {
+    return true;
+  } return false;
+}
   // return true if x and y are the same
   // otherwise return false
   // code here
-}
+
 
 function lessThanNinety(num) {
+  if (num < 90) {
+    return true;
+  }  return false;
+}
   // return true if num is less than ninety
   // otherwise return false
   // code here
-}
 
 function greaterThanFifty(num) {
+  if (num > 50) {
+    return true;
+  }   return false;
+}
   // return true if num is greater than fifty
   // otherwise return false
   // code here
-}
 
 function add(x, y) {
+  var sum = x + y;
+  return sum;
   // add x and y together and return the value
   // code here
 }
 
 function subtract(x, y) {
+  var sum = x - y;
+  return sum;
   // subtract y from x and return the value
   // code here
 }
 
 function divide(x, y) {
+  var sum = x / y;
+  return sum;
   // divide x by y and return the value
   // code here
 }
 
 function multiply(x, y) {
+  var sum = x * y;
+  return sum;
   // multiply x by y and return the value
   // code here
 }
 
 function getRemainder(x, y) {
+  var remainder = x % y;
+  return remainder;
   // return the remainder from dividing x by y
   // code here
 }
 
 function isEven(num) {
+  if (num % 2 === 0) {
+      return true;
+  }     return false;
+}
   // return true if num is even
   // otherwise return false
   // code here
-}
 
 function isOdd(num) {
+  if (num % 2 === 0) {
+    return false;
+    } return true;
+  }
   // return true if num is false
   // otherwise return false
   // code here
-}
 
 function square(num) {
+  return num * num;
   // square num and return the new value
   // code here
 }
 
 function cube(num) {
+  return Math.pow(num, 3);
   // cube num and return the new value
   // code here
 }
 
 function raiseToPower(num, exponent) {
+  return Math.pow(num, exponent);
   // raise num to whatever power is passed in as exponent
   // code here
 }
 
 function roundNumber(num) {
+    return Math.round(num);
   // round num and return it
   // code here
 }
 
 function roundUp(num) {
+    return Math.ceil(num);
   // round num up and return it
   // code here
 }
 
 function addExclamationPoint(str) {
+    return str + '!' ; 
   // add an exclamation point to the end of str and return the new string
   // 'hello world' -> 'hello world!'
   // code here
 }
 
 function combineNames(firstName, lastName) {
+    return firstName + ' ' + lastName;
   // return firstName and lastName combined as one string and separated by a space.
   // 'Lambda', 'School' -> 'Lambda School'
   // code here
 }
 
 function getGreeting(name) {
+    return 'Hello' + ' ' + name + '!';
   // Take the name string and concatenate other strings onto it so it takes the following form:
   // 'Sam' -> 'Hello Sam!'
   // code here
@@ -117,21 +158,26 @@ function getGreeting(name) {
 // If you can't remember these area formulas then head over to Google or look at the test code.
 
 function getRectangleArea(length, width) {
+    return length * width;
   // return the area of the rectangle by using length and width
   // code here
 }
 
 function getTriangleArea(base, height) {
+    return (base * height) / 2; 
   // return the area of the triangle by using base and height
   // code here
 }
 
 function getCircleArea(radius) {
-  // return the rounded area of the circle given the radius
+    var area = Math.PI * (radius * radius);
+    return Math.round(area);
+      // return the rounded area of the circle given the radius
   // code here
 }
 
 function getRectangularPrismVolume(length, width, height) {
+  return (length * width) * height;
   // return the volume of the 3D rectangular prism given the length, width, and height
   // code here
 }