Find the indices of the first and last non-blank characters in the given string. If the string is all blank, the first index is returned set to the end of the string and the last index is returned set to zero, i.e. INDEX1 is greater than INDEX2. If the string has no length, i.e. it is a substring with the first index greater than the second, both indices are returned set to zero.

CALL CHR_FANDL( STRING, INDEX1, INDEX2 )

STRING = CHARACTER $\ast$ ( $\ast$ ) (Given)

INDEX1 = INTEGER (Returned)

INDEX2 = INTEGER (Returned)