public class Main {
public static void main(String[] args) {
Main m = new Main();
m.doSum();
}
public void doSum() {
int sum = 0;
int oddSum = 0;
int evenSum = 0;
for (int i = 1; i < 1001; i++) {
if (i % 2 == 0) {
evenSum += i;
} else {
oddSum += i;
}
sum += i;
}
System.out.println("1-1000 æ»åï¼" + sum);
System.out.println("1-1000 å¥æ°æ»åï¼" + oddSum);
System.out.println("1-1000 å¶æ°æ»åï¼" + evenSum);
}
}
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