lib/standard/math: Added function is_even to Int

[nit.git] / lib / standard / math.nit

diff --git a/lib/standard/math.nit b/lib/standard/math.nit
index 7db6fa3..ba4db63 100644 (file)
--- a/lib/standard/math.nit
+++ b/lib/standard/math.nit
@@ -51,6 +51,16 @@ redef class Int
                if self > o then return (self - o).rshift(1).gcd(o)
                return (o - self).rshift(1).gcd(self)
        end
+
+       # Is `self` even ?
+       #
+       #    assert 12.is_even
+       fun is_even: Bool do return self % 2 == 0
+
+       # Is `self` odd ?
+       #
+       #    assert not 13.is_even
+       fun is_odd: Bool do return not is_even
 end
 
 redef class Float