How to implement factorial algorithm in php

Implementation steps: 1. Define a variable and assign a value of 1 to store the factorial result. The syntax is "$cj=1;"; 2. Use the for statement to loop through the numbers in the range of "1~n" and find Factorial of n, syntax "for ($i = 1; $i

The operating environment of this tutorial: windows7 system, PHP version 8.1, DELL G3 computer

In PHP, you can use the for loop to achieve Factorial algorithm.

Implementation steps:

Step 1: Define a variable and assign a value of 1 to store the factorial result

$cj=1;

Step 2: Use the for statement to loop through the numbers in the "1~n" range

If you want to find the factorial of n, you need to traverse the numbers1~n, so for The initial condition of the loop can be set toi = 1, and the restriction condition can bei <= nori < n 1.

for ($i = 1; $i <= $n; $i++) { //循环体代码 }

Step 3: In the loop body, multiply the $i value of each loop and assign it to $cj

$cj *= $i; //或 $cj = $cj * $i;

Wait until the loop ends After that, the value of variable $cj is the factorial of n, which can be output.

Complete implementation code

function f($n){ $cj=1; for ($i = 1; $i <= $n; $i++) { $cj *= $i; } echo " $n 的阶乘值为： $cj 
"; }

Call the f() function to find the factorial of 2, 3, and 4

f(2); f(3); f(4);

Recommended learning: "PHP Video Tutorial"

The above is the detailed content of How to implement factorial algorithm in php. For more information, please follow other related articles on the PHP Chinese website!