How to loop with sample input = 5
and the output :
1 2 3 4 5
0 2 3 4 5
0 0 3 4 5
0 0 0 4 5
0 0 0 0 5
PHP:
<?php
$i=5;
for($a=1; $a<=$i; $a++){
echo $a." ";
}
echo "
";
for($a=0; $a<=$i; $a++){
if($a==1){
continue;
}
print "$a ";
}
echo "
"; $ex = array(1,2);
for($a=1; $a<=$i; $a++){
if(in_array($a, $ex)){
continue;
}
print "$a ";
}
?>
How to solve this issue?
Think simple
<?php
$input = 5;
for($i = 1; $i <= $input; $i++ ) {
for($j = 1; $j <= $input; $j++) {
if( $i > $j) {
echo "0 ";
} else {
echo $j . " ";
}
}
echo "<br>";
}
?>
Using built-in functions, it's easier to read and understand:
$input = 5;
$nums = range(1, $input);
for ($zeros_count = 0; $zeros_count < $input; $zeros_count++) {
echo str_repeat('0 ', $zeros_count);
echo implode(' ', array_slice($nums, $zeros_count)) . PHP_EOL;
}