Loop in PHP

[ehrs]

Can some help, i don’t know how to solve this using loop in php.
$pay = [20, 40 , 89, 300, 190, 15];
$Capital = 1000;
I want the loop to achieve this result
1000-20 = 980
980-40 = 940
940-89 = 851
851-300 = 551
551-190 = 361
361-15 = 346

My code is:
$newbal = $Capital-$pay
for ($amount=$newbal; $amount>=$Capital; $amount-=$pay) {
echo “{$amount}
”;
$amount++;
}
My code is giving me this result:
1000-20 = 980
1000-40 = 960
1000-89 = 911
1000-300 = 700
1000-190 = 810
1000-15 = 985

[whispers]

Its because you never update the ‘capital’ amount to the new value.

Maybe something like this:

$pay = [20, 40 , 89, 300, 190, 15];
$capital = 1000;

for($i=0; $i<count($pay); $i++){
	echo $capital . ' - ' .  $pay[$i] . ' = ' . ($capital-$pay[$i]) . '<br>';
	//update capital value
	$capital = ($capital-$pay[$i]);
}