HP 3000 Manuals

HP Business BASIC/XL Reference Manual

UPDATE 

The UPDATE statement assigns a value to the current datum of a specified
BASIC DATA file, if the assignment is legal.  The UPDATE statement cannot
change the type of the datum, and it cannot change the length of a string
datum.

Syntax 

UPDATE #fnum; expr 

Parameters 

fnum             The file number that HP Business BASIC/XL uses to
                 identify the BASIC DATA file.  It is a numeric
                 expression that evaluates to a positive short integer.

expr             Its value is assigned to the current datum or the datum
                 indicated by the file's datum pointer if the assignment
                 is legal.

                 If the new value is not of the same type as the old
                 value, the UPDATE statement converts the new value to
                 the old type.  If this is impossible, an error occurs.

                 If expr is a string, and it is shorter than the string
                 that it replaces, it is blank-filled on the right.  If
                 expr is a string that is longer than the string that it
                 replaces, it is truncated on the right.

Examples 

The following statements show the update statement.

     10 UPDATE #1; 1234       !Updates #1
     20 UPDATE #2; "CAT"      !Updates #2
     30 UPDATE #3; SIN(X+35)  !Updates #3 with the results of a function
     40 UPDATE #3; LWC$("JOHN " + "DOE")   !Updates #4 with "john doe"

MPE/iX 5.0 Documentation