1 неделя назад · 29e329e238
--- a/3_JavaScript/10_日期对象.html
+++ b/3_JavaScript/10_日期对象.html
@@ -0,0 +1,21 @@
 
				+<!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>
			
 
				+        // 需要通过 new Date() 构建一个日期对象
			
 
				+        var today = new Date();
			
 
				+        // 如果想要获取日期对象中的信息 要通过特定的方法
			
 
				+        // getFullYear 获取当前年份
			
 
				+        var year = today.getFullYear();
			
 
				+        console.log(year);
			
 
				+        // getMonth 获取月份 值的范围是0-11;
			
 
				+        var month = today.getMonth();
			
 
				+        console.log(month);
			
 
				+    </script>
			
 
				+</body>
			
 
				+</html>
			
--- a/3_JavaScript/5_数值型.html
+++ b/3_JavaScript/5_数值型.html
@@ -30,7 +30,23 @@
 
				 
			
 
				         // 如果参与数学运算的操作数中有一个是字符串 如果这个字符串是一个数字那么可以把它转换成数值型运算
			
 
				         console.log("6" * 2);
			
 
				-        
			
 
				+
			
 
				+        var a = 2;
			
 
				+        // a = a * 2;
			
 
				+        a *= 2; //等价于a = a * 2
			
 
				+        a += 2; // a = a + 2
			
 
				+        a -= 2; // a = a - 2
			
 
				+        
			
 
				+        a = a + 1;
			
 
				+        a++ //表示自增 等价于a = a + 1 如果遇到赋值操作那么 先赋值再自增
			
 
				+        ++a // 也表示自增 如果遇到赋值操作 那么 先自增再赋值
			
 
				+
			
 
				+        var num1 = 3;
			
 
				+        // var num2 = num1++;
			
 
				+        var num2 = ++num1;
			
 
				+
			
 
				+        console.log("num2等于"+num2);
			
 
				+        console.log("num1等于"+num1);
			
 
				         
			
 
				         
			
 
				         
			
--- a/3_JavaScript/8_条件判断.html
+++ b/3_JavaScript/8_条件判断.html
@@ -69,6 +69,7 @@
 
				         // var a;//a 没有赋值 那么a 为 undefined
			
 
				         // 在js中数字也可以参与条件判断 除了0以外全部为真。0为假
			
 
				         // var a = 0;
			
 
				+        // 在js中字符串也可以参与条件判断 除了""空字符串都为真。空字符串为假
			
 
				         var a = "";
			
 
				         if(a){
			
 
				             console.log("a为真");
			
--- a/3_JavaScript/9_随机数字.html
+++ b/3_JavaScript/9_随机数字.html
@@ -0,0 +1,15 @@
 
				+<!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>
			
 
				+        // Math.random 默认情况下会生成一个0-1的随机数字
			
 
				+        var num1 = Math.random();
			
 
				+        console.log(num1);
			
 
				+    </script>
			
 
				+</body>
			
 
				+</html>
			
--- a/3_JavaScript/练习1_获取最大值.html
+++ b/3_JavaScript/练习1_获取最大值.html
@@ -0,0 +1,16 @@
 
				+<!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 max = num1 > num2 ? num1 : num2;
			
 
				+        console.log(max,num1,num2);
			
 
				+    </script>
			
 
				+</body>
			
 
				+</html>
			
--- a/3_JavaScript/练习2_闰年.html
+++ b/3_JavaScript/练习2_闰年.html
@@ -0,0 +1,21 @@
 
				+<!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 today = new Date();
			
 
				+        var year = today.getFullYear();
			
 
				+
			
 
				+        if((year%4==0 && year%100!=0) || year % 400 == 0){
			
 
				+            console.log(year + "是闰年");
			
 
				+        }else{
			
 
				+            console.log(year + "不是闰年");
			
 
				+        }
			
 
				+        
			
 
				+    </script>
			
 
				+</body>
			
 
				+</html>