bas7qck.hlp (Table of Contents; Topic list)
Limits - Names, Strings, and Numbers
  Memory and Capacity                          Contents  Index  Back
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QBX Environment Limits - Names, Strings, and Numbers
                                       Maximum                 Minimum
Variable name length                   40 characters           1 character
String length                          32,767 characters       0 characters
Integers                               32,767                 -32,768
Long Integers                          2,147,483,647          -2,147,483,648
Single precision numbers (positive)    3.402823E+38            2.802597E-45
Single precision numbers (negative)   -2.802597E-45           -3.402823E+38
Double precision numbers (positive)
                          Maximum:     1.79769313486231D+308
                          Minimum:     4.940656458412465D-324
Double precision (negative)
                          Maximum:    -4.940656458412465D-324
                          Minimum:    -1.79769313486231D+308
Currency
                          Maximum:     922337203685477.5807
                          Minimum:    -922337203685477.5808