const aaa = (num) => {
if (num > 10 ** 3) {
const arr=num.toString().split('.');
let num1=arr[0].split(''),i=num1.length-3;
while(i>0){
num1.splice(i,0,'-')
i-=3
}
num1=num1.join('')
arr[1]&&(num1 += '.'+arr[1]);
return num1.replaceAll('-',',')
}
}
console.log(aaa(1036926001.01))