text: 'use strict';
  
  const cityPopulation = new Map();
  
  cityPopulation.set('Shanghai', 24256800);
  cityPopulation.set('Beijing',  21516000);
  cityPopulation.set('Delhi',    16787941);
  cityPopulation.set('Lagos',    16060303);
  
  for (const city of cityPopulation) {
    console.log(city);
  }
  
  for (const [name, population] of cityPopulation) {
    console.log(`Population of ${name} is ${population}`);
  }
  