pxt-core-own/common-docs/types/function.md

Microsoft MakeCode, also known as Programming Experience Toolkit (PXT), provides Blocks / JavaScript tools and editors

# Function

A function is some amount of code you can reuse in your program. You create a function using a
function _definition_ which names the function and has its code. A function _call_ is when you use a
function by its name somewhere in your program.

## Defining a function

A function [**definition**](/types/function/define) is a block that has the name of the function and its code.

```block
function doSomething() {
}
```

## Calling a function

A function [**call**](/types/function/call) is when you want to use the code in the function at some place in your program.

```sig
function doSomething() {
}
doSomething();
```

### #specific

## See also

[define](/types/function/define), [call](/types/function/call)