JS Lesson 1 Homework

README.md

@@ -3,12 +3,12 @@
 ## Instructions
 ---
 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 = A variable is like a box that can store values inside and be descriptive about what kind of data it is holding.
+	* Strings = Strings are phrases that we store as text inside double ("") or single ('') quotes.
+	* Functions (arguments, `return`) = Functions are used to perform a task or to calculate values. We can use arguments so when we call functions we can pass in parameters and interpolate them inside of the function. When we use the return keyword it ends any function execution and will only return the statement after the return keyword.
+	* `if` statements = We use if statements to evaluate if a condition of something is true.
+	* Boolean values (`true`, `false`) = These values are like saying YES or NO. They will return to us depending on a condition we write if it's either a true or false condition.
 
 
 2. Install Node and NPM.  NPM comes packaged with Node. https://nodejs.org/en/download/

exercises.js

@@ -3,137 +3,186 @@
 function multiplyByTen(num) {
   // return num after multiplying it by ten
   // code here
+  return num * 10;
 }
 
 function subtractFive(num) {
   // return num after subtracting five
   // code here
+  return num - 5;
 }
 
 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
+  return x + y;
 }
 
 function subtract(x, y) {
   // subtract y from x and return the value
   // code here
+  return x - y;
 }
 
 function divide(x, y) {
   // divide x by y and return the value
   // code here
+  return x / y;
 }
 
 function multiply(x, y) {
   // multiply x by y and return the value
   // code here
+  return x * y;
 }
 
 function getRemainder(x, y) {
   // return the remainder from dividing x by y
   // code here
+  return x % y;
 }
 
 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
+  return num * num;
 }
 
 function cube(num) {
   // cube num and return the new value
   // code here
+  return num * num * num;
 }
 
 function raiseToPower(num, exponent) {
   // raise num to whatever power is passed in as exponent
   // code here
+  return Math.pow(num, exponent);
 }
 
 function roundNumber(num) {
   // round num and return it
   // code here
+  return Math.round(num);
 }
 
 function roundUp(num) {
   // round num up and return it
   // code here
+  return Math.ceil(num);
 }
 
 function addExclamationPoint(str) {
   // add an exclamation point to the end of str and return the new string
   // 'hello world' -> 'hello world!'
   // code here
+  return str + '!';
 }
 
 function combineNames(firstName, lastName) {
   // return firstName and lastName combined as one string and separated by a space.
   // 'Lambda', 'School' -> 'Lambda School'
   // code here
+  return firstName + ' ' + lastName;
 }
 
 function getGreeting(name) {
   // Take the name string and concatenate other strings onto it so it takes the following form:
   // 'Sam' -> 'Hello Sam!'
   // code here
+  return 'Hello ' + 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 the area of the rectangle by using length and width
   // code here
+  return length * width;
 }
 
 function getTriangleArea(base, height) {
   // return the area of the triangle by using base and height
   // code here
+  return base * height / 2;
 }
 
 function getCircleArea(radius) {
   // return the rounded area of the circle given the radius
   // code here
+  return Math.round(radius * radius * Math.PI);
 }
 
 function getRectangularPrismVolume(length, width, height) {
   // return the volume of the 3D rectangular prism given the length, width, and height
   // code here
+  return length * width * height;
 }
 
 // Do not modify code below this line.