P1 WEEK 3 M3 - INFORMATIE TECHNOLOGIE

• Informatica
• Middelbare school
• havo
• Leerjaar 4

Week 3 lesson 1

Startklaar zitten.

STARTKLAAR!

Tellie in zakkie

Startklaar zitten.

Activate prior knowledge

What is a programming language?

1. A language for instructing computers.
2. A language to sing.
3. A language for cooking.
4. A language to talk to friends.

Lets Play ! 

Kahoot 

What is a Variable?

A variable is like a container that stores information in a program.

You can name it and put different types of data inside (like numbers or text).

Types of Variables

Numbers: Used to store numerical values (e.g., age = 15).

Text: Used to store words or sentences (e.g., name = "Alice").

Booleans: Used to store true/false values (e.g., isStudent = true).

Why Use Variables?

Variables make programs flexible by allowing data to change.

Instead of hard-coding information, you can reuse and update variables easily.

How to Use a Variable

Create a variable: Give it a name and assign a value (e.g., score = 0).

Change its value as needed during the program (e.g., score = 10).

Imagine you have a game and want to keep track of the player’s points:

score = 0 # The game starts, and the player has 0 points

score is the variable. It holds the number of points.

When the player gets more points, we change the variable:

score = score + 10 # The player gets 10 points

Now the score variable is 10.

LEARNING OBJECTIVES

The student can understand and apply variables in programming using the control structure.

Lets Play ! 

Kahoot ! 

Variables Link

For the teacher

The student can:

Explain what a variable is and what it is used for in a program.

Recognize and use different types of variables (such as numbers, text, and Booleans) correctly.

Create a variable, assign it a value, and change the value of the variable during program execution.

Understand how variables can help make programs flexible and efficient by storing data that can be used or changed later.

Data types

In programming we talk about data types for example:

String = "1234567890-=][poiuytreADFGG" for example "Yourname"

Int = 0123456789 for example 85

Boolean = true or false for example True

A boolean should not go together with a string

In the real world we actually also have a kind of data types for example the picture below. It is impossible to be a dog and a bear together because they are built differently

A variable

A piece of space in the computer's memory that you or the computer can change

below is a variable created with the datatype string

var name = "Elif"

In the memory is the variable name created. In that memory we have stored "Elif"

A variable

var name

var isTeacher

var age

Change variable

name = "elif"

isTeacher = true

age = 39

Now what are the new values ​​of the variables? Write them down on a piece of paper

what was your answer

A variable

naam

isDocent

leeftijd

Change variable

name = name + "el'if"

age = age + 39

Now what are the new values ​​of the variables?

Write them down on a piece of paper

what was your answer

Creating assignments

Quizlet

https://quizlet.com/324147133/variables-computer-science-flash-cards/

I now know what a data type is and how to create a variable

Ja

Deels

Nee

I now know how to use a control structure

Ja

Deels

Nee

Can you write some examples of data types and tell what data type it is?

Can you make a variable to store an age. Also use a control structure. if your age is older than 18 then you are allowed to go to the horror movie otherwise not. use console.log to state "yes to horror movie" or "not to horror movie"

Summary

- Review in class

Week 3 les 2

Startklaar zitten.

STARTKLAAR!

Tellie in zakkie

Startklaar zitten.

Voorkennis activeren

create a variable to store the car color. if the color is white then console.log("2x per week wash ") else console.log("1 x per week wash")

Learning objectives

The student can use a for loop in a program to perform repetitive tasks.

https://youtu.be/wxds6MAtUQ0?si=-BYCTrRpejmC5k8f

For the teacher

The student can:

Explain what a for-loop is and what it is used for in a program.

Write a for-loop to repeat a task multiple times, such as printing a series of numbers or repeating a text.

Understand how the structure of a for-loop works, including the initial value, the condition and the step size (increment).

Apply a for-loop in your own code to solve repetitive tasks, such as iterating through a list or performing a calculation multiple times.

Instructions to the computer

ga naar https://www.programiz.com/javascript/online-compiler/

type the following over

Instructions to the computer

Steps to Use on Programiz:

Open the Programiz JavaScript Online Compiler.

Writethe code above into the editor.

Click the "Run" button.

The numbers 1 to 10 will be printed in the output section.

LOOP

// This program will print the numbers from 1 to 10

console.log("Numbers from 1 to 10:");

for (let i = 1; i <= 10; i++) {

    console.log(i); // Print the value of i in each loop

}

// Explanation:

// 1. 'let i = 1;' starts the loop at 1

// 2. 'i <= 10;' means the loop will run until i is 10

// 3. 'i++' increases the value of i by 1 each time the loop runs

Explaining the code 

for loop: This loop runs a block of code a specific number of times.

let i = 1: This initializes the loop and sets i to 1.

i <= 10: This is the condition that keeps the loop running as long as i is less than or equal to 10.

i++: After each loop, the value of i increases by 1.

In each iteration, console.log(i) prints the current value of i.

Print Even Numbers:

Modify the loop to print only even numbers between 1 and 10.

for (let i = 2; i <= 10; i += 2) {

    console.log(i);

}

Countdown from 10 to 1: Modify the loop to count down from 10 to 1.

for (let i = 10; i >= 1; i--) {

    console.log(i);

}

We can do this more easily

Answer the following questions and write them down on a piece of paper

What do you notice about the structure of the commands you entered?

Can you recognize a pattern in the code?

Do you think you can automate this process? How would you do that?

Write your answer below

Complete the assignment

Look at the assignment in teams

period 1 week 3 assignment 4/6

Now with a for loop

ga weer naar https://www.programiz.com/javascript/online-compiler/

Delete your old code and rewrite the code below.

Write a forloop where your name is printed 10 times on the screen?

Summary

Review in class

Week 5 

IF & ELSE

Introduction to JavaScript If-Else Statements

• JavaScript uses if-else statements to make decisions.
• These statements allow your code to take different actions based on conditions.
• We will learn how to check conditions and perform different tasks depending on whether the condition is true or false.
• Work on https://www.programiz.com/javascript/online-compiler/

What is a Condition?

• A condition is a statement that can either be true or false.
• Example: “If it rains, I will take an umbrella.”
• In programming, conditions are used to make decisions.

Basic If Statement

Adding an Else Statement

Multiple Conditions with Else-If

Comparison Operators

== : Equal to

!= : Not equal to

> : Greater than

< : Less than

>= : Greater than or equal to

<= : Less than or equal to

Comparison Operators

if (x == 10) { ... }

if (y != 5) { ... }

Recap of If-Else Statements

Use if to check if a condition is true.

Use else to define what happens if the condition is false.

Use else if for multiple conditions.