# ApCoCoA-1:DA.Class

From ApCoCoAWiki

## DA.Class

Returns the class of a given derivative.

### Syntax

DA.Class(X:INDET):INT

### Description

The function Class returns the class of derivative X, i.e., the index of the differential indeterminate of which it is a derivative.

@param

*X*Indeterminante for which the class is computed.@return The class of indeterminate X.

#### Example

Use Q[x[1..2,0..20]]; DA.Class(x[2,8]); ------------------------------- 2 -------------------------------