# Numbers and Scientific Notation

The **Num** object is used any time a number is created in an expression. The
**SciNum** object is used to create scientific notation.

All numbers are created using single object (the **Num** object in the **Math**
namespace). The actual number is attached as a value. The object that is used is named
**Num** in the **Math** namespace.

There is also an object for scientific notation called **SciNum** which is also in the
**Math** namespace. The ScuNum object has two parameters, the first is the mantisa, the
second is the exponent.

To create a number in scientific notation, you can create a number, multiply it by 10, and raise the "10" term to a power. The expression will be automatically converted to scientific notation.

The **Convert** command can be used to convert numbers between ordinary notation and
scientific notation.

In addition to creating a number by typing a numeric value into an empty box, the **Num**
object can be created without any specific number attached to it. This is primarily useful in
the pattern match process. If a **Num** object appears on the right-hand side of a pattern
match, it will match any number.

To create a **Num** object without a value attached to it, just type "*num*" in an
empty box and select the **Num** object in the **Math** namespace.