Automatic Recomputation
-----------------------

The "evaluates-to" operator, `=>', has the special property that any
`=>' formulas on the stack are recomputed whenever variable values or
mode settings that might affect them are changed.  *Note Evaluates-To
Operator::.

The `m C' (`calc-auto-recompute') command turns this automatic
recomputation on and off.  If you turn it off, Calc will not update
`=>' operators on the stack (nor those in the attached Embedded Mode
buffer, if there is one).  They will not be updated unless you
explicitly do so by pressing `=' or until you press `m C' to turn
recomputation back on.  (While automatic recomputation is off, you can
think of `m C m C' as a command to update all `=>' operators while
leaving recomputation off.)

To update `=>' operators in an Embedded buffer while
automatic recomputation is off, use `M-# u'.
See Embedded Mode.