a # 1 60 R ' c#a sub b                                                  '
a # a,[1]  '"multiprecision integer subtraction                         '
a # a,[1]  ' c#(a#fix a)add_b#fix b                                     '
a # a,[1]  ' $0                                                         '
a # a,[1]  '"sub - multiprecision integer subtraction                   '
a # a,[1]  '"from ''the apl handbook of techniques'' copyright 1978, ibm. '
a # a,[1]  '"-subtract b from a, giving c, using multiprecision integer '
a # a,[1]  '" arithmetic; a and b may be in any numeric format, c will  '
a # a,[1]  '" be mp integer.  see Gadd.                                 '
a # a,[1]  '"-uses: Gadd Gfix                                           '
Lfx a