WEBVTT

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hi in this video we'll be going through

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an introduction to carol so who or what

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is Carol

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well Carol is a dog who listens to your

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commands and this is a picture of Carol

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so programming or coding it's really

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just giving commands to a computer to

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tell it what we want it to do and this

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is just like giving commands to a dog so

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in this unit we'll be spending a lot of

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time with Carol giving carol commands

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and teaching carol new commands to learn

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the fundamentals of computer programming

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what exactly can we do with Carol well

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we can move Carol around Carol's world

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and put down and pick up tennis balls so

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this is Carol's world it's a grid world

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with walls along the entire edge and

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each dot in the grid world represents a

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space that Carol can stand on but what

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specifically can Carol do well Carol

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knows for commands Carol knows how to

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move turn left

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put down a tennis ball and take a tennis

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ball so the Move command moves Carol one

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space in the direction that carol is

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facing the turn left command turns Carol

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90 degrees to the left put ball puts

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down one tennis ball on the space that

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Carol is standing on and take ball picks

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up one tennis ball from the space that

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Carol is standing on now let's dissect a

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Carol command and see what all the parts

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are so that we can give Carol commands

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so first it has to be one of these four

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commands that Carol knows second we

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notice that there are no spaces in the

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commands and we need to match the

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capitalization exactly so that Carol can

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understand so move is lowercase and

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every command ends with open parenthesis

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close parenthesis semicolon and when

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we're giving commands to a computer we

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have to give commands in a language that

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the computer understands and we have to

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type it in a way that the computer

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understands so that's what's going on

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with Carol Carol only knows four

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commands and we have to type these

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commands precisely so that Carol can

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understand them so the best way to learn

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how to program with Carol is to just

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dive in and do it so here we'll be

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writing our first carol program

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that has Carol's start in the world on

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the left with Carol in the bottom left

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corner facing east and end in the world

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on the right where Carol moves forward

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two spaces puts down a tennis ball and

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then moves forward two more spaces so

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let's dive in and write this program so

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here we are in the code editor and this

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is where we will be writing our programs

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throughout the course now there's a lot

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of really cool features and tools in

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this editor that we'll learn about as we

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go through the course right now we'll

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just go over our first program so this

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is the area that we build our program

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and the way we build our program is by

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putting together the proper blocks so

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over here is the block area and we're

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able to drag blocks from the block area

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into the actual program so I'll drag out

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the move command from the blocks into

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the code area and if I drop it it'll

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snap right into place so this is where

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we build the program over here is where

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we can actually run our program and see

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the result of our code so I've written

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one move command let's see what happens

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when we click run so Carol moved one

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space go ahead and reset it and if you

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ever need a reminder for what the goal

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of the program is all you have to do is

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go over to this exercise tab right here

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so here's the run code tab we'll go over

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to exercise and see okay this is our

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goal this is what we want Carol to do so

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this is our goal we want Carol to move

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twice put down a tennis ball and then

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move two more times let's go ahead and

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write that program back to the run code

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so I pulled out one move command let's

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pull out one more and put a ball down

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and notice there's a lot more blocks we

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can play around with in these sections

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but for now we've only talked about

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commands so we're gonna stick with with

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this section right here in commands so

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we have Carol move move and put a ball

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let's let's see what that looks like

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move move put a ball awesome if we want

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the code to go slower we can actually

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move this slider and that curl is going

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to move a little bit slower move move

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football and we make Carol really fast

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you great now what's cool is if you

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don't want to use blocks you can

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actually switch to the code view right

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here by clicking this to this button or

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switch to code view and now we're

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actually typing so you have we've had

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Carol move twice and put a ball now

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would you need Carol to move two more

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times

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so let's move one more time move one

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more time let's see what that does

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what's cool is in the code view when we

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run it we can actually see each line

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highlight as it runs so there we go we

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got it Kiril moves moves puts down a

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ball moves and moves great now it's your

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turn to give it a try