Program to find the LCM of two numbers

 let hcf;

let val1 = Number(prompt('Enter the first number'));

let val2 = Number(prompt('Enter the second number'));

let min = val1 < val2 ? val1 : val2 //ternary operator

for (let i = 1; i <= min; i++) 

{

    if( val1 % i == 0 && val2 % i == 0) 

    {

        hcf = i;

    }

}

let lcm = (val1 * val2) / hcf;

console.log("LCM is " + lcm);

Another Method-

const num1 = Number(prompt('Enter a first positive integer: '));

const num2 = Number(prompt('Enter a second positive integer: '));

let min = (num1 > num2) ? num1 : num2;

while (true) {

    if (min % num1 == 0 && min % num2 == 0) {

        console.log("The LCM is "+ min);

        break;

    }

    min++;

}