// Declaring different variables of different data types

let firstName = 'Asabeneh'    // first name of a person
let lastName = 'Yetayeh'      // last name of a person
let country = 'Finland'       // country
let city = 'Helsinki'         // capital city
let age = 100                 // age in years
let isMarried = true

// Declaring variables with number values
// We can use keywords like var,let and const to declare variables
// let allows one time declaration and multiple time value assignment 
// const allows one time declarartion as well as assignment
// var allows multiple declaration and assignment.

const gravity = 9.81         // earth gravity  in m/s2
const boilingPoint = 100     // water boiling point, temperature in oC
const PI = 3.14              // geometrical constant

// Variables can also be declaring in one line separated by comma

let name = 'Asabeneh',     //name of a person
  job = 'teacher',
  live = 'Finland'