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fengchuanyu 9 months ago
parent
981f2080b4
commit
67c141d7b2
4 changed files with 101 additions and 1 deletions
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  1. 3 1
      3_js基础/5_分支判断.html
  2. 24 0
      3_js基础/综合练习1编程题1.html
  3. 27 0
      3_js基础/综合练习1编程题2.html
  4. 47 0
      3_js基础/综合练习1选择判断部分.html

+ 3 - 1
3_js基础/5_分支判断.html
View File 

@@ -79,11 +79,12 @@
 
         //     console.log("不成立");
 
         // }
 
 
-        var a = 1;
 
+        var a = 11;
 
 
         // if(a == 1){
 
         //     console.log("星期一")
 
         // }
 
+        // switch 他会接受一个变量然后跟每个case后面的值进行比较直到匹配成功，然后执行case后的语句。且遇到break结束当前switch
 
         switch (a) {
 
             case 1:
 
                 console.log("星期一");
 
@@ -95,6 +96,7 @@
 
             case 5:console.log("星期五");break;
 
             case 6:console.log("星期六");break;
 
             case 7:console.log("星期日");break;
 
+            default:console.log("没有匹配成功")
 
         }
 
 
     </script>

+ 24 - 0
3_js基础/综合练习1编程题1.html
View File 

@@ -0,0 +1,24 @@
 
+<!DOCTYPE html>
 
+<html lang="en">
 
+<head>
 
+    <meta charset="UTF-8">
 
+    <meta name="viewport" content="width=device-width, initial-scale=1.0">
 
+    <title>Document</title>
 
+</head>
 
+<body>
 
+    <script>
 
+        var num1 = Math.random();
 
+        var num2 = Math.random();
 
+        // var maxNum = Math.max(num1,num2);
 
+        // console.log(maxNum,num1,num2)
 
+
 
+        var maxNum = maxFun(num1,num2);
 
+        console.log(maxNum,num1,num2);
 
+
 
+        function maxFun(a,b){
 
+           var _maxNum = a>b?a:b;
 
+           return _maxNum;
 
+        }
 
+    </script>
 
+</body>
 
+</html>

+ 27 - 0
3_js基础/综合练习1编程题2.html
View File 

@@ -0,0 +1,27 @@
 
+<!DOCTYPE html>
 
+<html lang="en">
 
+
 
+<head>
 
+    <meta charset="UTF-8">
 
+    <meta name="viewport" content="width=device-width, initial-scale=1.0">
 
+    <title>Document</title>
 
+</head>
 
+
 
+<body>
 
+    <script>
 
+        var _thisData = new Date();
 
+        var thisYear = _thisData.getFullYear();
 
+
 
+        function foo(_year) {
 
+            if((_year%4==0 && _year%100!=0) || _year%400==0){
 
+                return "是闰年"
 
+            }else{
 
+                return "不是闰年"
 
+            }
 
+        }
 
+
 
+        console.log(foo(thisYear));
 
+    </script>
 
+</body>
 
+
 
+</html>

+ 47 - 0
3_js基础/综合练习1选择判断部分.html
View File 

@@ -0,0 +1,47 @@
 
+<!DOCTYPE html>
 
+<html lang="en">
 
+<head>
 
+    <meta charset="UTF-8">
 
+    <meta name="viewport" content="width=device-width, initial-scale=1.0">
 
+    <title>Document</title>
 
+</head>
 
+<body>
 
+    <div class="box"></div>
 
+    <script>
 
+        var str = "hello";
 
+        var str1 = "<div class='box'></div>";
 
+        var str2 = '<div class="box"></div>';
 
+
 
+        var num;
 
+        console.log(num);
 
+
 
+        num2 = 10;
 
+        console.log(num2);
 
+
 
+        //1+2 = 3
 
+        // 1+"hell"
 
+
 
+        // var a = 1;
 
+        // var b = 2;
 
+
 
+        // var a = 1,b=2;
 
+
 
+        // var a = true,b;
 
+
 
+        // \反斜线开头的表示转义字符 \n 回车
 
+        console.log("hello\nworld");
 
+        console.log("he\"llo")
 
+        console.log("hel\'lo");
 
+
 
+        //NaN    not a number 
+
 
+        // var str11 = "a";
 
+        // var str12 = "b";
 
+        var str11 = "11";
 
+        var str12 = "2";
 
+        console.log(str11<str12);
 
+
 
+
 
+    </script>
 
+</body>
 
+</html>