primitiveTypes.ts

// number type: number

let value0 : number = 10;
let value1 : number = 10.5;

// string type: string

let value2 : string = "Hello";
let value3 : string = `${value2} World`;

// boolean type: boolean

let value4 : boolean = true;

// null and undefined: null, undefined

let value5 : null = null;
let value6 : undefined = undefined;

// symbol type: symbol (represent unique values)

let value7 : symbol = Symbol("symbol");

// bigint type: bigint

let value8 : bigint = 9007199254740991n;