xampi Posted October 27, 2020 Share Posted October 27, 2020 So I want to create a table with php and html that outputs a 10x10 table with numbers from 0 to 99 and differentiating prime numbers: The problem is that every time it checks prime numbers from 0 to 99 it prints it in every '<tr>'. Ty in advance for the help! It outputs a check of primer numbers from 0 to 99 every tr and i want it to be a single check from 0 to 99 using 10 tr <html> <head> <meta http-equiv="Content-Type" content="text/html; charset=utf-8"/> </head> <body> <?php echo "<table>"; for($i=0; $i < 10; $i++){ echo "<tr>"; for($x=0; $x < 10; $x++){ for($i=0;$i<=99;$i++){ $counter = 0; for($j=1;$j<=$i;$j++){ if($i % $j==0){ $counter++; } } if($counter==2){ echo "<td style="background-color: yellow;">".$i."</td>"; }else{ echo "<td style="background-color: blue>".$i."</td>"; } } echo "</tr>"; } } echo "</table>"; ?> </body> </html> Quote Link to comment https://forums.phpfreaks.com/topic/311645-php-table-with-prime-numbers/ Share on other sites More sharing options...
Barand Posted October 27, 2020 Share Posted October 27, 2020 (edited) Hints Put the numbers 0 - 99 in an array and use array_chunk() to get the rows. Loop through each chunk to get the cells in each row. when checking for N is prime, it is necessary only to check for factors <= sqrt(N) Edited October 27, 2020 by Barand Quote Link to comment https://forums.phpfreaks.com/topic/311645-php-table-with-prime-numbers/#findComment-1582084 Share on other sites More sharing options...
Recommended Posts
Join the conversation
You can post now and register later. If you have an account, sign in now to post with your account.