Flow | variables defining

flow-var.js

var isFetching: boolean = false;

var luckyNumber: number = 10;

var notSoLuckyNumber: number = NaN;

var myName: string = 'Artem';

var dataNull: null = null;

var dataUndef: void = undefined;

var messages: Array<string> = ['hello', 'world', '!'];

var aboutMe: { name: string, age: number } = {
  name: 'Artem',
  age: 20,
};

/* You could define objects as maps where you map a string to some value. */
var namesAndCities: { [name: string]: string } = { 
  Preethi: 'San Francisco',
  Vivian: 'Palo Alto',
};

var someObject: Object = {};
someObject.name = {};
someObject.name.first = 'Preethi';
someObject.age = 26;

var iCanBeAnything:any = 'LALA' + 2;

var calculateArea = (radius: number): number => {
  return 3.14 * radius * radius
};