const a = 8, b = 20;
let lmc = (a > b) ? a : b;
while(true) {
if (lmc % a == 0 && lmc % b == 0) {
console.log("The LCM (Least Common Multiple) of " + a + " and " + b + " is: " + lmc);
break;
}
lmc++;
}
/*
run:
"The LCM (Least Common Multiple) of 8 and 20 is: 40"
*/