Average from Array - PHP - php

Question

<?php
$games = [
["Call of Duty", "Shooter", 59.95],
["Rocket League", "Sport", 19.95],
["Assassins Creed", "RP", 49.95]
];
?>
// i have an assignment where they want me to get the average string length from the titles and a average game price and echo it out like :
// echo "average price: €" . $averageprice;
// echo "average length of titles: " . $averagetitle
it needs to include:
number_format
for loop
i have tried numerous options but only got into coding for half a year now and havent really gotten into php. tried looking up different functions to use but couldnt get my head wrapped around it so i wonderd if the amazing coding community could heklp me out.

Answer 1

Average is computed as $sum_of_values/$number_of_values, so you can use for loop to loop throught all the items and sum them up as for example $sum_of_prices += $current_item[2] and finally divide it by length of array (count($games)).
For length of string, just find out length of string by strlen($current_item[0]) and add it to sum of lengths of titles like in prices. Finally divide it by length of array. You can use same loop for this.

Answer 2

Not sure to have understand right your request,
If games informations are always in the same position you can try something like this:
<?php
$games = [
["Call of Duty", "Shooter", 59.95],
["Rocket League", "Sport", 19.95],
["Assassins Creed", "RP", 49.95]
];
$avg_name_lenght = 0;
$avg_game_price = 0;
foreach($games as $game ){
$game_name_lenght = strlen($game[0]);
$avg_name_lenght += $game_name_lenght;
$game_price = $game[2];
$avg_game_price +=$game_price;
}
$avg_name_lenght = $avg_name_lenght / count($games);
$avg_game_price = $avg_game_price / count($games);
echo "<p>average price: €" . $avg_game_price."</p>";
echo "<p>average length of titles: " . $avg_name_lenght."</p>";
?>

Answer 3

Try something like this.
It includes a for loop en the number_format function:
function getAveragePrice($array) {
$sum = 0;
for($i = 0; $i < count($array); $i++) {
$sum += $array[$i][2];
}
return number_format($sum / count($array), 2);
}
function getAverageLength($array) {
$sum = 0;
for($i = 0; $i < count($array); $i++) {
$sum += strlen($array[$i][0]);
}
return number_format($sum / count($array), 2);
}
$averageprice = getAveragePrice($games);
$averagetitle = getAverageLength($games);
echo "average price: €" . $averageprice . "<br>";
echo "average length of titles: " . $averagetitle . "<br>";