More JavaScript Code

After a week of inactivity, I finally got back and resumed my JavaScript code. Im about a quarter of the way finished but I've still got some work to do. I've been going through this by doing them in chapters and that's helped me get this done faster. Below is some of the new code that I've put in.

//Adding

var sum=10+10;
console.log(sum) //shows that the answer is 20

//Subtraction

var difference = 45-33; //difference variable = 12

//Multiplication

var product = 8 * 10;

//Division

var quotient = 66 / 33;

//Incrementing Numbers

//Incrementing a number means to add 1 to it

var myVar = 87;

myVar=myVar+1; //87+1==88

myVar++; //The number has been incremented from 87 to 88 and can keep adding up

//Decrementing Numbers

//Decrementing a number means to subtract 1 from it

var myVar=11;

myVar=myVar-1; //11-1=10

myVar--; //Keeps subtacting

var ourDecimal=5.7;

var product= 2.0* 2.5;

console.log(product)

var remainder;

remainder = 11%3;

var quotient = 4.4 / 2.0;

var a = 3;

var b = 17;

var c = 12;


//Addition

a = a + 12;

b = 9 + b;

c= c + 7;

a += 12;

b += 9;

c += 7;

var a = 11;

var b = 9;

var c = 3;

//Subtracting

a = a - 6;
b = b - 15;
c = c - 1;

//Shortcuts
a -= 6;
b -= 15;
c -= 1;

//Multiplication

var a = 5;

var b = 12;

var c = 4.6;

a = a * 5;

b = 3 * b;

c = c * 10;

//Shortcuts
a *= 5;

b *= 3;

c *= 10;

//Division

var a = 48;

var b = 108;

var c = 33;

a = a / 12;

b = b / 4;

c = c / 11;

//Shortcuts

a /= 12;

b /= 4;

c /= 11;

var firstName = "Keshav"

var lastName = "Batra"

var myStr = "I am a \"double quoted\" string inside \ \"double quotes"

console.log(myStr);

var myStr = '<a href="http://www.example.com" target="_blank">Link</a>';

//Escape Sequences

/*****
//CODE OUTPUT
\'single quote
\"double quote
\\backslash
\n newline
\r carriage return
\t tab
\b backspace
\f form feed
*****/

var myStr = "FirstLine\n\t\\SecondLine\nThirdLine"

//Concatenating Strings with Plus Operator

//example
var ourStr = "I come first." + "I come second"
var myStr = "This is the start." + "This is the end."
console.log(myStr);

//Concatenating Strings with Plus Equals Operator

var ourStr = "I come first.";
ourStr += "I come second.";

var myStr = "This is the first sentence."
myStr += "This is the second sentence."

console.log(myStr);

//Constructing Strings with Variables

var ourName = "freeCodeCamp";
var ourStr = "Hello, our name is" + ourName + ", how are you?"; //ourName is freeCodeCamp

var myName = "Keshav";
var myStr = "My name is " + myName = " and I am well!";
console.log(myStr);

//Appending Variables to Stings

var anAdjective = "awesome!";
var ourStr = "freeCodeCamp is";
ourStr += anAdjective;
var someAdjective = "worthwhile";
var myStr = "Learning to code is";
myStr += someAdjective; //Learning to code is worthwhile

//Length of a String

var firstNameLength = 0;
var firstName = "Ada";

firstNameLength = 0;
var lastName = "Lovelace";
lastNameLength = lastName.length;
console.log(lastNameLength) //If the system is run, the number will appear as 8 since "Lovelace" has 8 letters

//Bracket Notation

var firstLetterOfFirstName = "";
var firstName = "Ada";

firstLetterOfFirstName = firstName [0]; //The number always starts counting from zero and if the bracket notation equals zero, firstName = A
var lastName = "Lovelace";

firstLetterOfLastName = lastName[0]; //The console will print whatever the first letter of the name is
console.log(firstLetterOfLastName) //L will appear since its the first letter of the last name
 
//String Immutability

var myStr = "Jello World";

myStr[0] = "H"// Fix me

myStr = "Hello World";

//Find the Nth Character

var firstName = "Ada";
var secondLetterOfFirstName = firstName[1]; //This will spawn "D"

//Setup

var lastName = "Lovelace";

var thirdLetterOfLastName = lastName[2]; // This will log V in the console

//Bracket Notation to find last Character in String

var firstName = "Ada";
firstLetterOfFirstName = firstName[firstName.length - 1]; //Since the length is 3 and 1 is subtracted, the length would then be 2 in which the letter would be "A"

var lastName = "Lovelace";

var lastLetterofLastName = lastName[lastName.length - 1]; //This will be the last letter of the last name which is E.

var thirdToLastLetterOfFirstName = firstname[firstName.length - 3] //This gets the third to last letter of the first name

var secondToLastLetterOfLastName = lastName[lastName.length - 2]; //This spawns the second to last letter of the last name in which this is C

//Word Blanks

function wordBlanks(myNoun, myAdjective, myVerb, myAdverb) {

    var result = "";
    result += "The " + myAdjective + myNoun + myVerb + "to the store"

    return result;
}

console.log(wordBlanks("dog", "big", "ran", "quickly"));
console.log(wordBlanks("bike", "slow", "flew", "slowly"));

//Arrays

var ourArray = ["John", 23];

var myArray = ["Jack", 1];

//Nest Arrays

var ourArray = [["the universe", 42], ["everything", 101010]]; //An array within an array

var myArray = [["Bulls", 23], ["White Sox", 34]];

//Access Array Data

var ourArray = [50,60,70];
var ourData = ourArray[0]; //Equals 50

var myArray = [50,60,70];

var myData = myArray[0];
console.log(myData);

//Modify Array Data

var ourArray = [18,64,99];
ourArray[1] = 45;

var myArray = [18, 64, 99];

myArray[0] = 45;
console.log(myArray)

//Access Multi-Dimensional Arrays

var myArray = [[1,2,3], [4,5,6], [7,8,9], [[10,11,12], 13,14]];

var myData = myArray[2][1]; //This will show the first element in the array
console.log(myData); //It will show 8

//Push

var ourArray = ["Stimpson", "J", "cat"]
ourArray.push(["happy", "joy"]);

//ourArray now equals ["Stimpson", "J", "cat", ["happy", "joy"]]

var myArray = [["John", 23], ["cat", 2]];

myArray.push(["dog", 3])

//Pop()

var ourArray = [1,2,3];
var removedFromOurArray = ourArray.pop(); //Removes the last element which is 3 and returns it to a variable

var myArray =  [["John", 23], ["cat", 2]];

var removedFromOurArray = myArray.pop();

console.log(myArray)

//Shift

var ourArray = ["Stimpson", "J", ["cat"]]
var removedFromOurArray = ourArray.shift();

var myArray = [["John", 23], ["dog", 3]];

var removedFromMyArray = myArray.shift();

//Unshift

var ourArray = ["Stimpson", "J", ["cat"]]
ourArray.shift();
ourArray.unshift("Happy");

var myArray = [["John", 23], ["dog", 3]];
myArray.shift();

myArray.unshift(["Paul", 35])

//Shopping List

var myList = [["cereal", 3], ["milk", 2], ["bananas", 3], ["juice", 2], ["eggs", 1]];

//Write reusable with functions

function ourReusableFunction(){
    console.log("Heyya, World");
}

ourReusableFunction(); 

function reusableFunction(){
    console.log("Hi world");
}
reusableFunction();

function ourFunctionWithArgs(a,b) {
    console.log(a - b);
}
ourFunctionWithArgs(10, 5); //Outputs 5

function ourFunctionWithArgs(a, b) {
    console.log(a + b);
}

functionWithArgs (10, 5) //10 and 5 go together to make 15