How do I print a sequence of letters with PHP, without using 'for'? It needs to be something like this:
I have a code like this:
<?php $a = 'a'; $n = 50; $i = 0; $k = 0; while ( $i < $n ) { echo $a." ".'<p></p>'; for ($k =0; $k<=$i; $k++) { echo $a." "; } $i++; } ?> But I don't need 'for', maybe something with 'while', 'if' or 'foreach'. Ideas?
<?php print implode( "\n", array_map( function($n) { return str_repeat('a', $n); }, range(1,10) ) ); Output:
a aa aaa aaaa aaaaa aaaaaa aaaaaaa aaaaaaaa aaaaaaaaa aaaaaaaaaa One option could be to use a second while loop:
$a = 'a'; $n = 50; $i = 0; while ($i < $n) { $k = -1; $str = ""; while ($k < $i) { $str .= " $a"; $k++; } echo "$str<br>"; $i++; } Another option could be using str_repeat
while ( $i < $n ) echo str_repeat($a, ++$i) . "<br>"; Actually I found a way too, thanks for all the answers!
<?php $i=0; $j=50; while($i < $j ) { $j=50; $k=0; while($k <= $i){ echo 'a'; ++$k; } echo "<p></p>"; $i++; } And it's easy to understand if you are new to the coding world.
$j.The following are equivalent.
for within for:
<?php for($i=1, $n=10; $i<=$n; $i++) { for($j=1; $j<=$i; $j++) { echo 'a'; } echo "\n"; } for and str_repeat:
<?php for($i=1, $n=10; $i<=$n; $i++) echo str_repeat('a', $i), "\n"; foreach with a range and str_repeat:
<?php foreach(range(1, 10) as $n) echo str_repeat('a', $n), "\n"; Output (for each of the snippets):
a aa aaa aaaa aaaaa aaaaaa aaaaaaa aaaaaaaa aaaaaaaaa aaaaaaaaaa