# Numbers

**Numbers** are values that can be used in mathematical operations. You don’t need any special syntax for numbers — just write them straight into JavaScript.

Example

12345;

## Decimals and fractions

JavaScript doesn’t distinguish between whole numbers and decimals, so you can use them together without having to convert from one to the other.

Editable Code

10 + 3.14159;

**Fractions** don’t exist in JavaScript, buy you can rewrite them as division problems using the division operator `/`

. Note that the resulting number is always converted to decimals — just like with a calculator.

Editable Code

1 / 3;

Improper fractions use the division operator in the same way.

Editable Code

11 / 10;

To use mixed numbers, you need to add the whole number and fraction.

Editable Code

1 + (4 / 3);

## Negative numbers

You can make a number negative by placing the `-`

operator in front.

Editable Code

-3;

You can also get a negative number by subtracting a number from a smaller number.

Editable Code

5 - 7;