What is the position variable and make code?
For programs to be useful, we need to be able to work with some of the simplest units of data: numbers, strings, structures, boolean values, and the like. Show Type InferenceIn TypeScript, there are several places where type inference is used to provide type information when there is no explicit type annotation. For example, in this code
The type of the All the examples below give an example type annotation, but will work just the same without the annotation. BooleanThe most basic datatype is the simple
NumberBoth whole numbers and numbers with a fractional part are supported. Sometimes numbers are called numeric literals. Integers: whole numbersInteger values can be specified using decimal, hexadecimal, binary, and octal notation. When the number isn’t expressed in its decimal form, special characters are used for notation to tell which form it is:
Floating point: numbers with a fractional partNumbers can have their fractional part too. The decimal point is between the digits of the number. But, floating point numbers have the decimal point at any spot between digits, like: 3.14159 or 651.75.
StringAs in other languages, we use the type
You can also use template strings, which can span multiple lines and have embedded expressions. These strings are surrounded by the backtick/backquote (
This is equivalent to declaring
ArrayArrays allow you to work with an expandable sequence of
values, addressed by an integer-valued index. Array types can be written in one of two ways. In the first, you use the type of the elements followed by
The second way uses a generic array type,
For the micro:bit, all elements of an array must have the same type. EnumA helpful addition to the standard set of datatypes from JavaScript is the
By default, enums begin numbering their members starting at
Or, even manually set all the values in the enum:
AnyThe TypeScript type Void
Declaring variables of type Null and undefinedA variable isn’t always set to a value. If you want a variable to exist but not have it set to a value of a type, it can be set to nothing, or
In a similar way,
What is a variable in block code?What is a variable? Variables are things that are remembered by the micro:bit. Variables can take a few formats and can have functions applied to them. For example, we could create a string, which is text. Or we could create a calculator that stores whichever number the user inputs as an integer, or whole number.
What is a variable in Minecraft?Variables are a lot like lockers: variables are places in which computers keep things. Computers need containers in which to keep numbers, text, and other information so that later they can make decisions. The code tells the computer when to look in these lockers and what to look for.
How do you assign a variable in block code?Here's how to make a variable in the Block Editor: Click variables . Change the default variable name if you like. Drag a block type on the right-side of the assignment operator and click the down arrow to change the variable name.
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