# Random Numbers

Random numbers bring flavor and variety to our programs. Creating random elements in our programs is easy with the use of randomly generated numbers.

## Randomizer

CodeHS makes it easy to generate random numbers with its built-in Randomizer method. For example, we can generate a random number between 1 and 4 by doing the following:

``````var randomNumber = Randomizer.nextInt(1, 4);
``````

The variable, `randomNumber`, now holds some random value between 1 and 4. This is inclusive. There are four possible random numbers: 1, 2, 3, or 4.

## Rolling Dice

We can use random numbers to simulate the act of rolling a die.

``````var roll = Randomizer.nextInt(1,6);
println("You rolled a " + roll);
``````

Each time we run the above code, the number printed to the screen changes.

## More Things to do with the Randomizer

In addition to creating random numbers, the Randomizer can be used to generate a few other random things.

Type Usage
Randomizer.nextInt(low, high); Creates a random number between low and high.
Randomizer.nextBoolean(); Creates a random boolean value - either true or false.
Randomizer.nextFloat(low, high); Creates a random decimal value float between low and high.
Randomizer.nextColor(); Creates a random color.

## Flipping a Coin

Now that we can create random boolean values, let's create a simple program to simulate flipping a coin.

``````var isHeads = Randomizer.nextBoolean();
Each time we run this code, the variable `isHeads` is assigned either a true or false boolean value. The program will print either `You flipped heads!` or `You flipped tails!` depending on this randomly generated boolean value.