Write a program to check whether a given number is an ugly number.
Ugly numbers are positive numbers whose prime factors only include 2, 3, 5. For example, 6, 8 are ugly while 14 is not ugly since it includes another prime factor 7.
Note that 1 is typically treated as an ugly number.
/**
* @param {number} num
* @return {boolean}
*/
var isUgly = function(num) {
if (num===1) {
return true;
}
if (num<=0) {
return false;
}
while ((num%2) < Math.pow(10,(-6))){
num = num/2;
}
while ((num%3) < Math.pow(10,(-6))){
num = num/3;
}
while ((num%5) < Math.pow(10,(-6))){
num = num/5;
}
if (num===1) {
return true;
} else {
return false;
}
};
