Java循环案例

谁践踏了优雅 2023-03-13 09:18 1阅读 0赞

## 计算0到100之间的奇数和偶数的和 ##

public static void main(String[] args) { 
            int oddSum=0;//奇数和
            int evenSum=0;//偶数和
            for (int i = 0; i <= 100; i++) { 
                if (i%2!=0){ //奇数
                    oddSum+=i;
                }else { //偶数
                    evenSum+=i;
                }
            }
            System.out.println("奇数的和："+oddSum);
            System.out.println("偶数的和："+evenSum);
        }

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## for循环输出0-1000之间能被5整除的数，并且每行输出3个 ##

public static void main(String[] args) { 
            System.out.println("for循环实现");
            for (int i = 1; i <= 1000; i++) { 
                if (i%5==0){ 
                    System.out.print(i+"\t");
                }
                if (i%(5*3)==0){ 
                    System.out.println();
                }
            }
            System.out.println();
            System.out.println("while循环实现");
            int a=1;
            while(a<=1000){ 
                if (a%5==0){ 
                    System.out.print(a+"\t");
                }
                if (a%(5*3)==0){ 
                    System.out.println();
                }
                a++;
            }
        }

--------------------

## 打印九九乘法表 ##

![在这里插入图片描述][watermark_type_ZmFuZ3poZW5naGVpdGk_shadow_10_text_aHR0cHM6Ly9ibG9nLmNzZG4ubmV0L2NhaXh1YW5qaQ_size_16_color_FFFFFF_t_70_pic_center]

public static void main(String[] args) { 
            for (int i = 1; i <= 9; i++) { 
                for (int j = 1; j <= i; j++) { 
                    System.out.print(j+"*"+i+"="+(j*i)+"\t");
                }
                System.out.println();
            }
        }

## 打印一个5行三角形 ##

![在这里插入图片描述][20200512214506340.png_pic_center]

public static void main(String[] args) { 
            //打印5行的三角形
            for (int i = 1; i <= 5; i++) { 
                for (int j = 5; j >= i; j--) { 
                    System.out.print(" ");
                }
                for (int j = 1; j <= i; j++) { 
                    System.out.print("*");
                }
                for (int j = 1; j < i; j++) { 
                    System.out.print("*");
                }
                System.out.println();
            }
        }

[watermark_type_ZmFuZ3poZW5naGVpdGk_shadow_10_text_aHR0cHM6Ly9ibG9nLmNzZG4ubmV0L2NhaXh1YW5qaQ_size_16_color_FFFFFF_t_70_pic_center]: /images/20230312/5b18c98b615949d5a7d6b168ce53627f.png
[20200512214506340.png_pic_center]: https://img-blog.csdnimg.cn/20200512214506340.png#pic_center