Factorial, in mathematics, the product of all positive integers less than or equal to a given positive integer and denoted by that integer and an exclamation point. Thus, factorial seven is written 7! meaning 1 × 2 × 3 × 4 × 5 × 6 × 7. Factorial zero is defined as equal to 1.
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In programming, a recursive function is a function that calls itself when it’s executed. This allows the function to repeat itself multiple times, producing the result at the end of each replication.
Here is the Example
| 123456789101112131415161718192021222324252627282930313233343536 | <!DOCTYPE html><html><head><meta charset=”utf-8″><meta name=”viewport”content=”width=device-width, initial-scale=1″><title>factorial-recursive-function</title></head><body><h4>FactorialofaGivenNumberusingRecursivefunction</h4><hr/><!—PHPCode–><?phpif(isset($_POST[‘submit’])){functionfact($n){if($n<=1){return1;}else{return$n*fact($n-1);}}$n=$_POST[‘number’];// Input Number$f=fact($n);echo”Factorial of $n is $f”;}?><form method=”post”><p>Enter the Number</p><input type=”text”name=”number”required><input type=”submit”name=”submit”></form></body></html> |
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