In Calc Window you can execute 4 types of commands
evaluate – evaluates expression and displays result in the Results Zone
assign – evaluate right-hand side expression and assigns it to left-hand side variable. Variable and its value appear in Variable Zone.
denote – assigns expression to variable without evaluation. Variable and its value appear in Variable Zone.
delete - deletes variable from the list of defined variables. Variable and its value are removed from Variable Zone.
Spaces are not allowed within a command.
You can combine several commands on the same line, separating them with spaces, and execute them in one go. Such a combination is called multi - command. The commands, comprising a multi‑command are executed left to right.