why this program is showing error? armstrong number checking

Question

class MyClass {
public static void main(String[ ] args) {
int n=145,r,x=0,result=0,temp;
temp=n;
while(n!=0)
{
r=n%10;
x++;
}
while(n!=0)
{
r=n%10;
result=result+Math.pow(r,x);
n=n/10;
}
if(result==temp)
System.out.println("amstrng");
else
System.out.println("not amstrng");

}
}

Answer 1

You need to convert double Math.pow(r,x) to int, like this:

result= result+ (int) Math. pow(r, x)

Narrowing must be explicit.
https://www.javatpoint.com/java-variables

Or change type of result variable into double