Prime or composite.(SUB)

DECLARE SUB PRIME (N)
INPUT "ENTER ANY NUMBER"; N
CALL PRIME (N)
END

SUB PRIME (N)
C = 0
FOR I = 1 TO N
IF N MOD I = 0 THEN C = C + 1
NEXT I
IF C = 2 THEN
PRINT N; "IS PRIME NUMBER"
ELSE
PRINT N; "IS COMPOSITE NUMBER"
END IF
END SUB