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Calculates the number of occurrences of an object in an array.

Name Type Description
inArray <T>Array Input array
inValue <T> Value to count
outCount Integer Number of value occurrences

The type of this filter is defined using the type variable T which represents any valid type. Read more.


Description of usage of this filter can be found in examples and tutorial: Button Presence.
inArray = {1,4,2,4,4,10,8}
inValue = 4
outCount = 3


Please note, that this filter can be concretized only with basic data types and structures of such types. Concretizing the filter with a non-comparable complex data type, such as Image or Region, will raise a Domain Error.

Using this filter to compare data of type Real (or structures with this type) may be tricky. It is caused by the fact that very small (unnoticeable) differences in values of such types may lead to unpredictable negative results in comparison of these values.


This filter can throw an exception to report error. Read how to deal with errors in Error Handling.

Non-comparable complex data type "TypeName" used in CountValueInArray.

Complexity Level

This filter is available on Basic Complexity Level.

See Also

  • FindAll – Finds all locations of a given value in the input array.