Variables concept

typescript variables

// There are 3 basic types in Typescript
var isDone: boolean = false;
var age: number = 42;
var myName: string = "Anders";

// Not sure which the type of the variable is
var notSure: any = true;
notSure = 23;
notSure = "maybe a string";

null vs undefined

// prints null
var emptyVariable = null;
console.log(emptyVariable);

// prints undefined
var newVariable;
console.log(newVariable);

collection

// list
var list: number[] = [1, 2, 3];
var list: Array<number> = [1, 2, 3];