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Text File  |  1985-05-10  |  256 b   |  11 lines
  1. go  :- 
  2.     repeat,
  3.     print( 'Enter a number: ' ),
  4.     get0( Num ), nl,
  5.         (
  6.           ( (Num > 58), print( 'You did not enter a number'),
  7.                 nl, fail)
  8.           ;
  9.           (print( 'Do it over, please. ' ), nl, fail )
  10.         ).
  11.