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In the previous class, you learned about the introduction to coding and MakeCode Arcade. In this
class, you are going to learn more about MakeCode Arcade.
What are Variables?
You have seen your mother naming boxes in the kitchen.
That box has a little storage capacity and your mother gave
it a name such as salt, sugar, tea, etc. Similarly, a variable
is a name given to a location in the computer’s memory to
store values or data. A variable has a name (for reference),
a type (which defines the kind of data it can store and its
size), and a value (the actual data).
Naming Variables
Each variable in a program must have a unique name; you cannot use the same name for more than
one variable. The name of a variable serves as an identifier.
Rules for Naming a Variable
Some rules for naming a variable are as follows:
Name your variables in such a way that it describes their purpose.
Variable names must begin with a letter or an underscore.
No special characters or spaces are allowed in variable names.
Uppercase and lowercase characters are distinct.
Keywords (reserved words) cannot be used as a variable name. A keyword is a predefined word in
any programming language.
Creating Variable
In MakeCode Arcade, we can create a variable using the Variables block category. Once a variable
is created, you need to assign a value to it. This process of assigning a value to a variable is called
initialisation. To create and initialise a variable in MakeCode Arcade, follow these steps:
1 Visit https://arcade.makecode.com/.
2 Click on the New
Project button. The
Create a Project
dialog box appears.
More on MakeCode Arcade 103

