### 15.5.6. countTrue

The `countTrue` function returns the number of mesh nodes on the specified region that evaluate to “true”, where true means greater than or equal to 0.5. The `countTrue` function is valid for 1D, 2D, and 3D locations.

    countTrue(<Expression>)@<Location>

where `<Expression>` is:

- In CFD-Post, an expression that contains the logical operators =, >, <, <=, or >=.

- In CFX-Solver, an Additional Variable that you define. For example:

      TemperatureLE = Temperature > 300[K]

`countTrue(TemperatureLE)@Polyline1` returns the number of nodes on the specified polyline locator that evaluate to true.

#### 15.5.6.1. Tools > Command Editor Examples

In CFD-Post:

    >calculate countTrue(Temperature > 300[K]), Domain1

In CFX-Solver:

    >calculate countTrue(TemperatureLE), Domain1

#### 15.5.6.2. Tools > Function Calculator Example

This example returns the number of nodes that evaluate to “true” in the specified domain.

Function: `countTrue`, Location: `MainDomain`, Expression: `Temperature > 300[K]`.

Release 18.2 - © ANSYS, Inc. All rights reserved.