diff --git a/isPower2 b/isPower2
new file mode 100644
index 0000000..025b796
--- /dev/null
+++ b/isPower2
@@ -0,0 +1,4 @@
+int isPower2(int x){
+	int res = ((!((1 << 31) & x)) & (!(x & (x + (~0)))) & (!!x));
+	return res;
+}