Arrays 1

Variable

An object that can store a value for later use.
Question: Where are variables stored?
On the RAM (specifically the stack or heap)
Question: What are some things we can store?
Numbers, letters, strings, True or false.
Question: What are a few ways to store numbers?
Integer = Whole numbers (1, 2, 3)
Float = Real numbers(1.3, 3.12, 0.23)

Arrays 2

Arrays

Arrays can store multiple bits of data in one variable.
Question: What data types can be stored?
In most languages - Any
Question: Can an Array hold different types of data?
Lots of Languages can but some like C can not.
Question: What does an array look like in JS?
Var integerArray = [1, 2, 4, 2, 58];
Question: How would I access the number 4 from an array?
console.log(integerArray[2]);

Conditionals

A conditional is a branch in the code

Question: name any conditional types you know

If, Case, Switch, ifelse, ifelseif

All conditionals break down to...

Either true or false

Question: in an if else if conditional if the first conditional is true will it still check the following conditionals?

A conditional you might use.

If length of name is 0 {
    reply "You gave me no name
} else {
    reply "Hello name"
}

Loops

Computers do three things much faster or better then humans:

Math, Memory, and Repetition

Looping allows a computer to repeat a segment of code as long
as the developer wishes depending on the need.

Incoming geek joke...

Question: What are some kinds of Loops?

For, While, Do While

Javascript

function punishmentCheat(sentence) {
    for (var count = 0; count < 500; count++) {
        console.log(sentence);
    }
}

punishmentCheat("I will not throw paper airplanes in class.");

For Loop

A for loop runs until a conditional is met

Notes:

will check conditional before running once
after each pass will run a segment of code
Most common infinite loop:
- need to count down to 0 code segment goes up

function punishmentCheat(sentence) {
    for (var i = 0; count < 500; count++) {
        console.log(sentence);
    }
}

punishmentCheat("I will not throw paper airplanes in class.");

While Loop

A while loop runs while a conditional is true

Notes:

will check conditional before running code
Does not run any code after each loop
- conditional must be met within loop segment
Most common infinite loop:
- forget to match conditional in code segment

function punishmentCheat(sentence) {
    count = 0;
    while (count < 500) {
        console.log(sentence);
        count++;
    }
}

punishmentCheat("I will not throw paper airplanes in class.");

Infinite While Loop

Do While Loop

A do while loop runs while a conditional is true

Notes:

Will check conditional at end of loop segment
Does not run any code after each loop
- conditional must be met within loop segment
Most common infinite loop:
- forget to match conditional in code segment

function punishmentCheat(sentence) {
    count = 0;
    do {
        console.log(sentence);
        count++;
    } while (count < 500) 
}

punishmentCheat("I will not throw paper airplanes in class.");

Workshop challenge

https://www.hackerrank.com/contests/master/challenges/c-tutorial-conditional-if-else?