js random number between 1 and 100

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

//usage example: getRandomNumberBetween(20,400); 

// Genereates a number between 0 to 1;
Math.random();

// to gerate a randome rounded number between 1 to 10;
var theRandomNumber = Math.floor(Math.random() * 10) + 1;

Math.floor(Math.random() * 10);

Math.floor(Math.random() * 3);

//an equation that returns either 1 or -1
var number = (Math.floor(Math.random() * 2) * 2) -1;