is power of 2 exam exercise

subjects/ispowerof2.md

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+# ispowerof2
+## Instructions
+
+Write a function that determines if a given number is a power of 2.
+
+This function returns true if the given number is a power of 2, otherwise it returns false.
+
+Your function must be declare as follows:
+
+## Expected function
+
+```go
+
+func Ispowerof2(n uint) bool {	
+
+}
+
+```
+