public/subjects/ispowerof2

ispowerof2

Instructions

Write a program that determines if a given number is a power of 2. A number n is a power of 2 if it meets the following condition: n = 2 ^m where m is another integer number.

For example, 4 = 2 ² or 16 = 2 ⁴ are power of 2 numbers while 24 is not.

This program must print true if the given number is a power of 2, otherwise it has to print 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 :

$ go run . 2 | cat -e
true$
$ go run . 64
true
$ go run . 513
false
$ go run .
$ go run . 64 1024
$