js + random number in range without math.floor

// Between any two numbers
Math.floor(Math.random() * (max - min + 1)) + min;

// Between 0 and max
Math.floor(Math.random() * (max + 1));

// Between 1 and max
Math.floor(Math.random() * max) + 1;function getRandomNumberBetween(min,max){
    return Math.floor(Math.random()*(max-min+1)+min);
}

//usage example: getRandomNumberBetween(20,400); 
var randomNo = Math.floor(Math.rand() * 10000000001);
console.log(randomNo);

//This will generate random numberint jj = reader.nextInt();