I've tried, tried, and nothing. A program that multiplies a number entered by someone in descending order.
For example:
I typed 7 and gave OK: 7x6x5x4x3x2x1
The result of all this should appear.
Code I already have:
<?php
$n = $_GET['num'];
$n2 = $n1;
$tot = 0;
while($n >= 1){
$n2 = $n2 - 1;
$tot = $n2 * $n2;
$n--;
echo "$tot <br>";
}
?>
So you want to calculate the factorial of a number:
$i = $_GET['num'];
$calc = 1;
while ($i > 1){
$calc *= $i;
$i--;
}
echo $calc;
In mathematics, the factorial of a natural number n, represented by n !, is the product of all positive integers less than or equal to n.
If you want to calculate the factorial of a number, you can use the array_product function to calculate the product of the values contained in the array that in this case would be the sequence generated by the range() function.
See:
$numero = 7; //Pode vir de um GET ou POST
$v = array_product(range($numero, 1));
print_r($v);
Output:
5040
More information in this answer .