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The most obvious feature of Forth is the stack. When you type in a
number, it is pushed on the stack. You can display the content of the
1 2 .s 3 .s
.s displays the top-of-stack to the right, i.e., the numbers
.s output as they appeared in the input.
You can print the top of stack element with
1 2 3 . . .
In general, words consume their stack arguments (
.s is an
Assignment: What does the stack contain after
5 6 7 .?