## ispowerof2

### Instructions

Write a program that determines if a given number is a power of 2.

This program must print `true` if the given number is a power of 2, otherwise it prints `false`.

- If there is more than one or no argument the program should print nothing.

- When there is only one argument, it will always be a positive valid int.

### Usage :

```console
student@ubuntu:~/ispowerof2$ go build
student@ubuntu:~/ispowerof2$ ./ispowerof2 2 | cat -e
true$
student@ubuntu:~/ispowerof2$ ./ispowerof2 64
true
student@ubuntu:~/ispowerof2$ ./ispowerof2 513
false
student@ubuntu:~/ispowerof2$ ./ispowerof2
student@ubuntu:~/ispowerof2$ ./ispowerof2 64 1024
student@ubuntu:~/ispowerof2$
```