Get the Number Sequence through X++

//This following code to get the number sequece by using code.
//this following example describe to get purchID and ProjJournalID

ProjJournalTable _projJournalTable;
PurchTable _PurchTable;

_projJournalTable.JournalId = NumberSeq::newGetNum(ProjParameters::numRefProjJournalId()).num();
_PurchTable.PurchId = NumberSeq::newGetNum(PurchParameters::numRefPurchId()).num();