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Use -= to count down by twos
Program 5.9 Use -= to count down by twos
As you might guess there is a corresponding = operator. If you wanted to count down from twenty to zero by twos you could write:
class CountToZeroByTwos {
public static void main (String args[]) {
int i;
for (i=20; i >= 0; i -= 2) {
System.out.println(i);
}
System.out.println("All done!");
}
}
Here's the output.
% javac CountToZeroByTwos.java
% java CountToZeroByTwos
20
18
16
14
12
10
8
6
4
2
0
All done!
%
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