用while do-while for循环分别计算100以内的奇数及偶数的和，并输出。

package chap2_流程控制.struct;

/**
 * while do-while for
 * 计算0~100之间的奇数和与偶数和
 */

public class Test03 {
    public static void main(String[] args) {
        //while循环
        int oddSum1 = 0;
        int evenSum1 = 0;
        int i1=0;
        while (i1<=100){
            if (i1%2!=0){
                oddSum1 += i1;
            }else {
                evenSum1 += i1;
            }
            i1++;
        }
        System.out.println("奇数和"+oddSum1);
        System.out.println("偶数和"+evenSum1);
        System.out.println("=====================================");
        //do-while循环
        int oddSum2 = 0;
        int evenSum2 = 0;
        int i2=0;
        do {
            if (i2%2 !=0){
                oddSum2 += i2;
            }else {
                evenSum2 += i2;
            }
            i2++;
        }while (i2<=100);
        System.out.println("奇数和"+oddSum2);
        System.out.println("偶数和"+evenSum2);
        System.out.println("=====================================");
        //for循环
        int oddSum = 0;  //奇数和
        int evenSum = 0; //偶数和

        //快捷键 100.for
        for (int i = 0; i <= 100; i++) {
            if (i%2 !=0){
                oddSum += i;
            }else {
                evenSum +=i;
            }
        }
        System.out.println("奇数和"+oddSum);
        System.out.println("偶数和"+evenSum);
    }
}