<- [[crpl:crplreference| CRPL reference]] <- [[crpl:crplreference#stack_manipulation|Stack Manipulation]] ===== dup ===== ^Arguments^Result^Notation^ |Some item on the stack|Two copies of the item on the stack |''n1 -- n1 n1 ''| === Description === Duplicates the item currently on the stack without removing the original item. === Examples === #Square a number 5 dup mul