Code:
public class Main
{
public static int isHappyNumber(int num){
int rem = 0, sum = 0;
//Calculates the sum of squares of digits
while(num > 0){
rem = num%10;
sum = sum + (rem*rem);
num = num/10;
}
return sum;
}
public static void main(String[] args) {
int num = 82;
int result = num;
while(result != 1 && result != 4){
result = isHappyNumber(result);
}
//Happy number always ends with 1
if(result == 1)
System.out.println(num + " is a happy number");
//Unhappy number ends in a cycle of repeating numbers which contains 4
else if(result == 4)
System.out.println(num + " is not a happy number");
}
}
Output:
Tags:
Java Programs
