isPowerOfTen

Checks if the given number is a power of 10.

• Use Math.log10() and the modulo operator (%) to determine if n is a power of 10.

const isPowerOfTen = n => Math.log10(n) % 1 === 0;

isPowerOfTen(1); // true
isPowerOfTen(10); // true
isPowerOfTen(20); // false