Repeat Actions and Test for Conditions

Boolean variable

Can be assigned one or two possible values, true or false

For loop

Contains three parts: an iterative (i) variable, a conditional test, and an iterative stop. This is a good option if you have a set condition or number of times you need a loop to repeat. It is also possible to nest loops inside each other

GPS sensors

Detect location

Accelerometer

Detects motion

Barometer

Detects pressure and altitude

What are the three ways to modify/change an array?

1. Access a specific item - using its element index number, change the value that is stored within it. 2. Add items - you can add an item to the end by pushing an item to the end of the array. 3. Shorten the array - section off or splice away the section you want to keep

Array

A group of individual values referred to using a single name. Each value can be referred to using a unique integer as the element index

Which logical operator would you use to evaluate if two tests are both true?

AND

What cannot be used to create a Boolean value?

An integer

While loop

At the top you ask a question as a conditional statement that evaluates as either true or false. If true, the loop will run. If false, the loop will stop

Equality operators

Give you a true or false answer. There are 6 to choose from: values are equal (==); one value is not equal (!=); one value is greater than (>); one value is greater than or equal to (>=); one value is less than (<); one value is less than or equal to (<=)

AND Logical Operator

If A is true and B is true, then it is true

OR Logical operator

If A is true or B is true, then it is true

Do while loop

Instead of testing the condition first, it tests it last. This way the loop is ran at least once

What is the phrase used to refer to the number of items in an array?

Length

User input

Not automatic, you as the programmer define how the user and program work together

What problems can an infinite loop cause?

Program to crash, run out of memory, or generate multiple errors that prevent the program running correctly

NOT operator

Reverses the Boolean value, so not true is false and not false is true

Synchronous input

Some inputs happen while the program runs. The programming and input capturing happen in parallel

If I have an array with the values 23, 55, 16; to splice off the 55 & 16, what two numbers do I need to know?

Start index: 1; number of items: 2

Asynchronous input

The program stops and waits for you to provide input to contine

Conditional

Using a conditional, the programmer can define a limit to the number of times a loop runs

Loops

Ways a programmer can take a section of code and have a program run them multiple times

Infinite loop

When there are conditions that are always true, your program could be stuck in an infinite loop

What is the first element index in an array?

Zero