Workflow Definition Language Functions Collection contains, length, empty, intersection, union, first, last, take, skip, join String concat , substring, replace, guid , toLower , toUpper , indexof , lastindexof , startswith , endswith , split Logical equals, less, lessOrEquals , greater, greaterOrEquals , and, or, not, if Conversion int, string {}, json , float, bool, base64 , base64ToString, binary, dataUriToString , dataUri , uriComponent , triggerFormDataValue , formDataValue , xml , array , etc. Manipulation coalesce, addProperty , setProperty , removeProperty , xpath Math add, sub, mul , div, mod, min, max, range, rand Date utcnow , addseconds , addminutes , addhours , adddays , formatDateTime , startOfDay , dayOfYear , etc. https://docs.microsoft.com/en-us/azure/logic-apps/logic-apps-workflow-definition-language