Empty string: Difference between revisions

=={{header|ALGOL 68}}==

{{works with|ALGOL 68G|Any - tested with release 2.8.win32}}

<lang algol68># declare a string variable and assign an empty string to it #

STRING s := "";

# test the string is empty #

IF s = "" THEN write( ( "s is empty", newline ) ) FI;

# test the string is not empty #

IF s /= "" THEN write( ( "s is not empty", newline ) ) FI;

# as a string is an array of characters, we could also test for emptyness by #

# checking for lower bound > upper bound #

IF LWB s > UPB s THEN write( ( "s is still empty", newline ) ) FI</lang>