53 lines
1.4 KiB
C#
53 lines
1.4 KiB
C#
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using System;
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namespace Lesson19_循环语句for
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{
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class Program
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{
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static void Main(string[] args)
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{
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#region 知识点一 基本语法
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//格式
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//for (初始表达式; 条件表达式; 增量表达式)
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//{
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// //循环代码
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//}
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for (int i = 0; i < 10; i++)
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{
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Console.WriteLine("这时的i为{0}",i);
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}
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Console.WriteLine("\n换行\n");
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#endregion
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#region 知识点二 支持嵌套
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for (int i = 0; i < 10; i++)
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{
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for (int j = 0; j < 5; j++)
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{
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Console.WriteLine("i的值为{0},j的值为{1}", i, j);
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}
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}
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#endregion
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#region 知识点三 特殊写法
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for (; ; )//空位可填可不填
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{
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Console.WriteLine("这是一个死循环");
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break;//用break跳出死循环
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}
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#endregion
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#region 知识点四 对比while循环
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int j = 0;
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while (j < 10)
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{
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Console.WriteLine("j为{0}",j);
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}
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j=0;//重置j
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for (; j < 10; )//初始表达式和增量表达式可省略
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{
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Console.WriteLine("j为{0}", j);
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}
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#endregion
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}
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}
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}
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