A non-zero value in ⎕RTL places a time limit, in seconds, for input requested via ⍞, ⎕ARBIN, and ⎕SR.  ⎕RTL may be assigned any integer in the range 0 to 32767.  The value in a clear workspace is 0. ⎕RTL has Namespace scope.

Example

      ⎕RTL←5 ⋄ ⍞←'FUEL QUANTITY?' ⋄ R←⍞
FUEL QUANTITY?
TIMEOUT
      ⎕RTL←5 ⋄ ⍞←'FUEL QUANTITY?' ⋄ R←⍞