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@@ -1,68 +1,63 @@
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<!DOCTYPE html>
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<html lang="en">
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-<head>
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- <meta charset="UTF-8">
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- <meta name="viewport" content="width=device-width, initial-scale=1.0">
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+ <head>
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+ <meta charset="UTF-8" />
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+ <meta name="viewport" content="width=device-width, initial-scale=1.0" />
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<title>Document</title>
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-</head>
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-<body>
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+ </head>
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+ <body>
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<!--
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+ - * / %（取余/模）
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-->
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- <script>
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- var a = 1;
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- var b = 2;
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- var c = 10;
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- var d = 5;
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- // console.log(a+b);//3
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- // console.log(c-b);//8
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- // console.log(a*b);//2
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- // console.log(b/a);//2
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- // console.log(d % c);//5 去低段位的值
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- // console.log(b % c);//2
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- // console.log(a % c);//1
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- // console.log(c % c);//0
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- // console.log(c % 3);//1
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-
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- // console.log(a + '1');//11 加法运算 number + string 拼接
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- // console.log(a + c); // 11
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- // console.log('3'+'12');//312 string + string 拼接
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- // console.log(d + true); //6 加法运算中true=1 false=0
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- // console.log(b + null)//2
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- // console.log(b+undefined)//NaN 非法数字
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-
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- // console.log(c-b);//8
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- // console.log(c-'4'); //6 减法 string number 执行正常的运算规则
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- // console.log(c-'hello');//NaN
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- // console.log(c-true);//9 减法运算中true=1 false=0
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- // console.log(c-null);//10
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- // console.log(c-undefined);//NaN
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-
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- // console.log(c*b);//20
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- // console.log(c*'4'); //40 乘法 string number 执行正常的运算规则
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- // console.log(c*'hello');//NaN
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- // console.log(c*false);//0 乘法运算中true=1 false=0
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- // console.log(c*null);//0
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- // console.log(c*undefined);//NaN
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-
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-
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- // console.log(c/b);//5
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- // console.log(c/'4'); //2.5 除法 string number 执行正常的运算规则
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- // console.log(c/'hello');//NaN
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- // console.log(c/false);//Infinity 除法运算中true=1 false=0
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- // console.log(c/null);//Infinity
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- // console.log(c/undefined);//NaN
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-
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- console.log(c%b);//0
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- console.log(c%'2'); //2.5 取余 string number 执行正常的运算规则
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- console.log(c%'hello');//NaN
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- console.log(c%false);//NaN 取余运算中true=1 false=0
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- console.log(c%null);//NaN
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- console.log(c%undefined);//NaN
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-
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-
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-
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- </script>
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-
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-</body>
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-</html>
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+ <script>
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+ var a = 1;
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+ var b = 2;
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+ var c = 10;
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+ var d = 5;
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+ // console.log(a+b);//3
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+ // console.log(c-b);//8
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+ // console.log(a*b);//2
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+ // console.log(b/a);//2
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+ // console.log(d % c);//5 去低段位的值
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+ // console.log(b % c);//2
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+ // console.log(a % c);//1
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+ // console.log(c % c);//0
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+ // console.log(c % 3);//1
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+
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+ // console.log(a + '1');//11 加法运算 number + string 拼接
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+ // console.log(a + c); // 11
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+ // console.log('3'+'12');//312 string + string 拼接
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+ // console.log(d + true); //6 加法运算中true=1 false=0
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+ // console.log(b + null)//2
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+ // console.log(b+undefined)//NaN 非法数字
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+
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+ // console.log(c-b);//8
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+ // console.log(c-'4'); //6 减法 string number 执行正常的运算规则
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+ // console.log(c-'hello');//NaN
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+ // console.log(c-true);//9 减法运算中true=1 false=0
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+ // console.log(c-null);//10
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+ // console.log(c-undefined);//NaN
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+
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+ // console.log(c*b);//20
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+ // console.log(c*'4'); //40 乘法 string number 执行正常的运算规则
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+ // console.log(c*'hello');//NaN
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+ // console.log(c*false);//0 乘法运算中true=1 false=0
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+ // console.log(c*null);//0
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+ // console.log(c*undefined);//NaN
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+
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+ // console.log(c/b);//5
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+ // console.log(c/'4'); //2.5 除法 string number 执行正常的运算规则
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+ // console.log(c/'hello');//NaN
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+ // console.log(c/false);//Infinity 除法运算中true=1 false=0
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+ // console.log(c/null);//Infinity
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+ // console.log(c/undefined);//NaN
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+
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+ console.log(c % b); //0
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+ console.log(c % "2"); //2.5 取余 string number 执行正常的运算规则
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+ console.log(c % "hello"); //NaN
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+ console.log(c % false); //NaN 取余运算中true=1 false=0
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+ console.log(c % null); //NaN
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+ console.log(c % undefined); //NaN
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+ </script>
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+ </body>
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+</html>
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e