JS .toLocaleString() - Add comma into number

Question

//Add the .toLocaleString() function next to value
console.log('5 year with/out dividend = ' + (Math.round(annual * 5 + e5)).toLocaleString() + '|' + (Math.round(annual * 5)).toLocaleString());
//e.g output 550467 to 550,467

Answer 1

//Dividend minus Initial amount
let x = 1.07, // 7% dividend
    annualDividend = 200000 * x, 
    initAmount = 200000,
    div1 = annualDividend, 
    div2 = div1 * x;
    
console.log('RM ' + (div2 - initAmount).toLocaleString());