DUP
Duplicates an item at the top of the stack
Input stack: a
Output stack: a a
PumpkinDB> 0x10 DUP
0x10 0x10
Allocation
None
Errors
EmptyStack error if nothing is available on the stack
Tests
works : 1 1 DUP EQUAL?.
empty_stack : [DUP] TRY UNWRAP 0x04 EQUAL?.