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Task/Leap-year/FreeBASIC/leap-year.freebasic

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+' version 23-06-2015
+' compile with: fbc -s console
+
+#Ifndef TRUE        ' define true and false for older freebasic versions
+    #Define FALSE 0
+    #Define TRUE Not FALSE
+#EndIf
+
+Function leapyear(Year_ As Integer) As Integer
+
+    If (Year_ Mod 4) <> 0 Then Return FALSE
+    If (Year_ Mod 100) = 0 AndAlso (Year_ Mod 400) <> 0 Then Return FALSE
+    Return TRUE
+
+End Function
+
+' ------=< MAIN >=------
+
+' year is a FreeBASIC keyword
+Dim As Integer Year_
+
+For Year_ = 1800 To 2900 Step 100
+    Print Year_; IIf(leapyear(Year_), " is a leap year", " is not a leap year")
+Next
+
+Print : Print
+
+For Year_ = 2012 To 2031
+    Print Year_;
+    If leapyear(Year_) = TRUE Then
+        Print " = leap",
+    Else
+        Print " = no",
+    End If
+    If year_ Mod 4 = 3 Then Print ' lf/cr
+Next
+
+' empty keyboard buffer
+While InKey <> "" : Wend
+Print : Print "hit any key to end program"
+Sleep
+End