for循环作业

作业代码

• 练习1：计算0到100之间的奇数和偶数的和

   public static void main(String[] args) {
        int oddSum=0;
        int evenSum=0;
        for (int index=1;index<=100;index++){
            if(index%2!=0){
                oddSum+=index;
            }else{
                evenSum+=index;
            }
        }
        System.out.println("奇数总和："+oddSum);
        System.out.printf("偶数总和:"+evenSum);
    }

• 练习2：用while或for循环输出1-1000之间能被5整除的数，并且每行输出3个

    public static void main(String[] args) {
        for (int i = 1; i <= 100; i++) {
            if(i%5==0){
                System.out.print(i+"\t");
            }
            if(i%(5*3)==0){
                System.out.print("\n");
            }
        }
    }

• 练习3：打印九九乘法表

public static void main(String[] args) {

        for (int j=1;j<=9;j++){
            for (int i = 1; i <= j; i++) {
                System.out.print(j+" * "+i+" = "+(j*i)+"\t");
            }
            System.out.printf("\n");
        }
    }