Break commands

LOGO has three break commands: stop, stopall and op, output.

• stop can have two results. If it is included in a repeat or while loop, the program jumps out of the loop then and there. If it occurs in a procedure, the program breaks out of the procedure immediately.
• stopall the program breaks out of all the procedure immediately and stops.
• output, op allows breaking out of a procedure with a value to be returned.

See the numerous instances of usage of these two primitives in the examples at the end of this manual.