John Davidson

Message:

i'm trying to make cartesian coordinate for my coursework and can only get here, I'm grateful if anyone can help me to fix this "0" line

<?php

$n=10;

for($i=-10;$i<=$n;$i++){

    for($j=-10;$j<=$n;$j++){

        if($i==0 || $j==0){

            echo " $i ";

        }   else {

                echo "   ";

            }

        

    }

    echo "\n";

}

Current output
What i expected

---

My Answer:
Sure, here is an example of how you can create a Cartesian coordinate system using a for loop in PHP:

php

// Define the size of the coordinate system
$size = 10;

// Loop through the y-axis
for ($y = $size; $y >= -$size; $y--) {
// Loop through the x-axis
for ($x = -$size; $x <= $size; $x++) {
// Check if the current point is the origin
if ($x == 0 && $y == 0) {
echo "O ";
} else {
echo "($x, $y) ";
}
}
echo "\n";
}

?>


This code will create a Cartesian coordinate system with a size of 10 in both the x and y directions. The origin will be represented by the letter "O" and all other points will be displayed as (x, y) coordinates.