Below are some of the basic data types used in C#

• bool: True or False. e.g.

bool isAlive =true;


• double: 64-bit double-percision floating point type e.g.

double num = 99999;


• float: 64-bit single-percision floating point type. e.g.

float num = 12.99f;


• int: This is any whole number e.g.

int age = 22;


• char: This is any single character, digit, or punctuation mark e.g.

char gender = 'M';

(Always remember when declaring char variables you must use ' ')

• String: Sequence of characters such as letters, digits or punctuation marks. e.g.

String message = '!!I like coding!!';

(Always remember when declaring String variables you must use " " and for char variables you must use ' ')

• Variables are containers for storing data values. For example

int age = 22;

In this case variable age stores the value 22.

Arithmetic Operators

Addition	+
Subtraction	-
Multiplication	*
Division	/
Increment	++
Decrement	--
Remainder	%

Comparsion Operators

Equal	==
Not equal	!=
Greater than	>
Greater than or equal to	>=
Less than	<
Less than or equal to	<=

Logical Operators

Logical AND	&&
Logical OR	||
Logical NOT	!

A loop is used to tell the computer to do something more than once. In Scratch, you may have come across the following loop blocks.

How do we do this in C#?

In C#, the common types of loops you will use are: while loop, do-while loop and for loop.

Click here to see an example of the while loop in C#.

Click here to see an example of the do-while loop in C#.

Click here to see an example of the for loop in C#.

Arrays in C# allows you to stores multiple values in a single variable.

There are two kinds of arrays, fixed length and dynamic.

To declare a fixed length array

String[] name = new String[10];

To declare a dynamic array

String[] name;

Below are some of the basic data types used in JavaScript

• Boolean: True or False. e.g.

var isLoggedIn = false;


• String: Sequence of characters such as letters, digits or punctuation marks. e.g.

var message = '!!I like coding!!';

Always remember when declaring String variables you must use " " or ' '

• Number: Integer or floating-point values like 0 or 15.32. e.g.

var price = 1.23;

• Variables are containers for storing data values. When declaring a variable we use the keyword var. e.g.

var name = 'Joe';

In this case variable name stores the value Joe.

Arithmetic Operators

Addition	+
Subtraction	-
Multiplication	*
Division	/
Increment	++
Decrement	--
Remainder	%

Comparsion Operators

Equal	===
Not equal	!==
Greater than	>
Greater than or equal to	>=
Less than	<
Less than or equal to	<=

Logical Operators

Logical AND	&&
Logical OR	||
Logical NOT	!

IF / Else statements are used to perform different actions based on different decisions.

A loop is used to tell the computer to do something more than once.

In Scratch, you may have come across the following loop blocks

How do we do this in JavaScript?

In JavaScript, the two common types of loops you will use are: for and while.

A for loop is used when you know in advance how many times the script should perform.

Click here to see an example of the for loop in JavaScript.

A while loop is used when you want the loop to continue until a certain condition becomes true.

Click here to see an example of the while loop in JavaScript.

Arrays in JavaScript allows you to stores multiple values in a single variable.

To create an array in JavaScript

var animal = ['Cat','Dog','Rabbit'];