From BR Wiki
To prepend string1$ to string2$ means to join string1$ to the beginning of string2$.
To append to the beginning of a string you should use
X$(0:0)="append this to front"
X$(1:0)="append this to front"
00010 dim result$*255 ! dimension long enough to fit the result 00020 let result$ = " and this is the end" 00030 let string_to_prepend$ = "this is the front" 00040 let result$(0:0) = string_to_prepend$ 00050 print result$
The output of the program above will be:
this is the front and this is the end