- <!DOCTYPE html>
- <html lang="en">
- <head>
- <meta charset="UTF-8">
- <meta name="viewport" content="width=device-width, initial-scale=1.0">
- <meta http-equiv="X-UA-Compatible" content="ie=edge">
- <title>Document</title>
- </head>
- <body>
- </body>
- <script>
- // 空心菱形
- for(var i = 0;i<20;i++){
- for(var j = 1;j<20;j++){
- if( i <10){
- if((10-i) == j ){
- document.body.innerHTML+=''
- }else if((10+i) == j ){
- document.body.innerHTML+=''
- }else{
- document.body.innerHTML+=' '
- }
- }else{
- if((i-10+1) == j ){
- document.body.innerHTML+=''
- }else if((19-(i-10)) == j ){
- document.body.innerHTML+=''
- }else{
- document.body.innerHTML+=' '
- }
- }
- }
- document.body.innerHTML += '</br>';
- }
- </script>
- </html>
来源: http://www.qdfuns.com/article/43865/8b085ac352dcf8a2896282ba044b0413.html