C#循环练习题九九乘法表

1.输出九九乘法表

 1 //99乘法口诀表 :矩形
 2             for (int i = 1; i < 10; i++)
 3             {
 4                 for (int j = 1; j <=9; j++)
 5                 {
 6                     Console.Write("{0}*{1}={2}\t",i,j,i*j);//占位符
 7                 }
 8                 Console.WriteLine();//换行
 9             }
10             //三角形
11             for (int i = 1; i < 10; i++)
12             {
13                 for (int j = 1; j <= i; j++)
14                 {
15                     Console.Write("{0}*{1}={2}\t", i, j, i * j);//占位符
16                 }
17                 Console.WriteLine();//换行
18             }

输出简单图形练习

 1             //输出
 2             ///******
 3             ///******
 4             ///******
 5             ///******
 6             for (int i = 0; i < 5; i++)
 7             {
 8                 for (int j = 0; j < 8; j++)
 9                 {
10                     Console.Write("*");
11                 }
12                 Console.WriteLine();
13             }
14 
15             ///*
16             ///**
17             ///***
18             ///****
19             ///*****
20             for (int i = 0; i < 5; i++)
21             {
22                 for (int j = 0; j <= i; j++)
23                 {
24                     Console.Write("*");
25                 }
26                 Console.WriteLine();
27             }
28 
29             ///*****
30             ///****
31             ///***
32             ///**
33             ///*
34             for (int i = 5 - 1; i >= 0; i--)
35             {
36                 for (int j = 0; j < i; j++)
37                 {
38                     Console.Write("*");
39                 }
40                 Console.WriteLine();
41             }
42 
43             ///*****
44             ///*   *
45             ///*   *
46             ///*   *
47             ///*****
48             for (int i = 0; i < 5; i++)
49             {
50                 for (int j = 0; j < 5; j++)
51                 {
52                     if ((i !=0 && i != 4 ) && (j != 0 && j != 4))
53                     {
54                         Console.Write("口");
55                         continue;
56                     }
57                     Console.Write("我");
58                 }
59                 Console.WriteLine();
60             }
61 
62 
63             ///12345
64             ///1234
65             ///123
66             ///12
67             ///1
68             for (int i = 5; i >= 1; i--)
69             {
70                 for (int j = 1; j <= i; j++)
71                 {
72                     Console.Write(j);
73                 }
74                 Console.WriteLine();
75             }