Data Types & Variables

Both concepts cannot be neglected when learning a new programming language. While AssemblyScript is very heavily inspired by TypeScript, there are some important differences, especially when it comes to the data types, that are built in.

Variables

Variables can be created as known from JavaScript with the keywords var, let and const. While var shouldn't be used anymore, const is for creating constant variables.

To make values accessible to JavaScript, they can be exported:

export const name: string = 'Max'

To import and use a variable like this in JavaScript:

import { name } from './build/release.js'

console.log('The name is ', name.value)

Data Types

Integer Types

Type	Description
i32	32-bit signed integer
u32	32-bit unsigned integer
i64	64-bit signed integer
u64	64-bit unsigned integer
i8	8-bit signed integer
u8	8-bit unsigned integer
i16	16-bit signed integer
u16	16-bit unsigned integer

unsigned = No negative values, signed = Negative values allowed

Float types

Type	Description
f32	32-bit float
f64	64-bit float

Strings

const name: string = 'hello'

Arrays

const arr = new Array<string>(5)