Example 1: Factors of a Positive Integer
public class Main {
public static void main(String[] args) {
// positive number
int number = 60;
System.out.print("Factors of " + number + " are: ");
// loop runs from 1 to 60
for (int i = 1; i <= number; ++i) {
// if number is divided by i
// i is the factor
if (number % i == 0) {
System.out.print(i + " ");
}
}
}
}
Output
Factors of 60 are: 1 2 3 4 5 6 10 12 15 20 30 60
In the above program, number whose factors are to be found is stored in the variable number (60).
The for loop is iterated until i <= number is false. In each iteration, whether number is exactly divisible by i is checked (condition for i to be the factor of number) and the value of i is incremented by 1.
Example 2: Factors of Negative Number
class Main {
public static void main(String[] args) {
// negative number
int number = -60;
System.out.print("Factors of " + number + " are: ");
// run loop from -60 to 60
for(int i = number; i <= Math.abs(number); ++i) {
// skips the iteration for i = 0
if(i == 0) {
continue;
}
else {
if (number % i == 0) {
System.out.print(i + " ");
}
}
}
}
}
Output
Factors of -60 are: -60 -30 -20 -15 -12 -10 -6 -5 -4 -3 -2 -1 1 2 3 4 5 6 10 12 15 20 30 60
In the above example, we have computed all the factors of a negative number. Here, the for loop runs from -60 to 60.
And, when the value of i is 0, the iteration is skipped. Otherwise, there will be an exception.
Note: The Math.abs() method returns the absolute value of the number.