how to print this series using for loop only
2 4 6 8 10 12
12 13 14 15 16 17
17 18 19 20 21
21 22 23 24 25 26
What have you tried?
I have tried using nested for loop
for($i=1;$i<=4;$i++){
for($j=1;$j<=7;$j++){
echo $j*2;
}
echo "<br>";
}Play with the rules until you get it to print what you want…
for($i=1;$i<=4;$i++){
for($j=1;$j<=($i % 3 == 0 ? 5 : 6);$j++){
if($last <12){
$last = $j*2;
} elseif($j == 1) {
//$last = $last -1;
} elseif($last >= 12) {
$last += 1;
}
echo "$last\t";
}
echo "\n";
}
1 Like
<?php
for(true;;){
echo '2 4 6 8 10 12
12 13 14 15 16 17
17 18 19 20 21
21 22 23 24 25 26';
break;
}
1 Like
Learning loops does have practical purposes as I just updated my vanilla javascript game (I’m still doing it) and I had to configure my database table to be compatible with my JSON. I didn’t feeling reconfiguring my MySQL Database Table, so I rewrote some PHP using loops and other functions.
/*
* Put database table in proper array format in order that
* JSON will work properly.
*/
foreach ($data as $qdata) {
foreach ($qdata as $key => $value) {
switch ($key) {
case 'answer1':
$answers['answers'][$index] = $value;
break;
case 'answer2':
$answers['answers'][$index + 1] = $value;
break;
case 'answer3':
$answers['answers'][$index + 2] = $value;
break;
case 'answer4':
$answers['answers'][$index + 3] = $value;
break;
}
} // foreach inner
unset($qdata['answer1']);
unset($qdata['answer2']);
unset($qdata['answer3']);
unset($qdata['answer4']);
$finished = array_merge($qdata, $answers);
$mData[$indexArray] = $finished;
$indexArray++;
}
I just wanted to share this as it does come in handy.
Why does the third line only have 5 numbers? If there is some spesific rule for that it will dictate how you have to code it