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| <!doctype html> | |
| <meta charset= "utf-8" > | |
| <title> print Diamond </title> | |
| <script type= "text/javascript" > | |
| var num = prompt ("Please enter the number of lines printed:"); | |
| for (var i=1;i<=num;i++)//determines the number of rows to output | |
| { | |
| for (var j=1;j<=num-i;j++)//determines the number of spaces at the beginning of each line | |
| { | |
| document.write ("the"); | |
| } | |
| for (var k=1;k<=2*i-1;k++)//Determine the * number of each line | |
| { | |
| document.write ("*"); | |
| } | |
| document.write ("</br>"); | |
| } | |
| <!--/* Output the lower half of the diamond */--> | |
| for (var i=1;i<=num-1;i++)//determines the number of rows to output | |
| { | |
| for (var j=1;j<=i;j++)//determines the number of spaces at the beginning of each line | |
| { | |
| document.write ("the"); | |
| } | |
| for (var k=1;k<=2*num-1-2*i;k++)//Determine the * number of each line | |
| { | |
| document.write ("*"); | |
| } | |
| document.write ("</br>"); | |
| } | |
| </script> | |
| <body> | |
| </body> | |
JavaScript print Diamond input print line number automatic printing
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