UniBasic Commands Reference - Rocket Software

[]
Syntax
1-67 UniBasic Commands Reference
string.expr [num.expr1,num.expr2] = expr
expr = string.expr [num.expr1, num.expr2]
Description
The UniBasic [] (square brackets) function extracts or replaces strings.
Null Value Handling
With null value handling on, when UniBasic encounters the null value in a command
parameter where a number is expected (num.expr1, num.expr2), it displays a warning
message and uses 0.
Note: In BASICTYPE M and P, the [] (square brackets) function can remove a
substring entirely and can also remove parts of the substring.
Parameters
The following table describes each parameter of the syntax.
Parameter Description
string.expr In the first form, the function replaces part or all of string.expr. In the
second form, the function extracts part or all of string.expr.
num.expr1 Indicates the starting position for the operation. It refers to the character
position where the replacement or extraction operation occurs.
num.expr2 Indicates the number of characters involved in the operation. If UniData
performs an extraction, it returns that number of characters. If UniData
performs a replacement, it replaces that number of characters.
[ ] Parameters