RosettaCodeData/Task/Empty-string/QBasic/empty-string.basic

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SUB IsEmpty (s AS STRING)
IF LEN(s) = 0 THEN
PRINT "String is empty"
ELSE
PRINT "String is not empty"
END IF
IF s = "" THEN PRINT "yes, the string is empty"
IF s <> "" THEN PRINT "no, the string is not empty"
END SUB
DIM s AS STRING ' implicitly assigned an empty string
IsEmpty (s)
t$ = "" ' explicitly assigned an empty string
IsEmpty (t$)
u$ = "not empty"
IsEmpty (u$)