Move a long, word or byte from the memory location at the top of stack to the stack. Same suffixes as mts. Numbers are placed on the stack by entering them as commands. Primitive and defined words are called by typing their names. No heed is given to the placement of spaces and carriage returns.
Defined words are simply files of the words name containing the instructions.
Loops must be managed using recursion. Recursion is a technique wherein a word will test the state of a counter and then call itself again. If it isn't, it will call loop again. Try this and don't forget to enter zero onto the stack before running loop. There is no one if statement.