GolfScript automatically coerces values, according to the following ‘priority’ sequence:

integer → array → string → block

(listed from lowest to highest.)

This means that "1"7+ leaves the string "17" on the stack (and not 8), because strings have a higher priority than integers.

[To those GolfScript veterans – apologies for insulting your respective intelligences.]

How would it be possible to do this any other (hopefully) shorter way? That is, to coerce a string into
an integer?