documentation Documentation Engage Online help Administration Mapp Engage Functions Current: Verify Quantities Verify Quantities These functions count the number of items in a source. They return integers, which can be evaluated with mathematical operations.FunctionDescriptionfn:lengthReturns the string length or the number of items in a collection.ecm:countMapElementsReturns the number of elements inside a map. ecm:countMapElements fn:length ×