untuk Gelung

const seasons = { mar: 'summer', jul: 'monsoon', sep: 'autumn', nov: 'spring', jan: 'winter' } //Loop over property-keys & return in an array const kys = Object.keys(seasons); kys; // [ 'mar', 'jul', 'sep', 'nov', 'jan' ] //Loop over property-values & return in an array const vals = Object.values(seasons); vals; // [ 'summer', 'monsoon', 'autumn', 'spring', 'winter' ] //Loop over entries i.e index-with-its-corresponding-value & return in an array of arrays const item = Object.entries(seasons); item; // [ [ 'mar', 'summer' ], [ 'jul', 'monsoon' ], [ 'sep', 'autumn' ], [ 'nov', 'spring' ], [ 'jan', 'winter' ] ] for(const x of item){ console.log(x); } // [ 'mar', 'summer' ] [ 'jul', 'monsoon' ] [ 'sep', 'autumn' ] [ 'nov', 'spring' ] [ 'jan', 'winter' ] for(const [key, val] of item){ console.log(`${key} ${val}`); } // 'mar summer' 'jul monsoon' 'sep autumn' 'nov spring' 'jan winter' // Total no of properties on the object console.log(`${Object.keys(seasons).length}`); // '5' let final = `Total ${Object.keys(seasons).length} seasons: `; for(const season of Object.values(seasons)){ // Loop over name of each property final += `${season}, `; } // 'Total 5 seasons: summer, monsoon, autumn, spring, winter, '