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factorial numbers!!!
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Write a Java application that displays factorials for a user input specified number. The factorial of a number, n, is the product of all of the positive integer values between 1 and n, and denoted by the ! symbol. For example, the factorial of 5, 5!, is calculated by multiplying 1 x 2 x 3 x 4 x 5 = 120. 10! is 1 x 2 x 3 x 4 x 5 x 6 x 7 x 8 x 9 x 10 = 3,628,800. The following link to a Wikipedia page has more information on factorial, http://en.wikipedia.org/wiki/Factorial.
The program is to use a for loop to repeat for the number input by the user and keep a running total of the factorial. Below are examples of the output from the program for numbers input:
The program is to use a for loop to repeat for the number input by the user and keep a running total of the factorial. Below are examples of the output from the program for numbers input:
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We already know what factorials are and how to compute them. But thanks anyway for the tip
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We can't just give you some code away, sure we can solve this, but it's your homework ...
You should first show what you've done so far, and if you get stuck, you post your code and ask specific questions about it ...
In fact you could use a simple for-loop, but you could make your code even shorter by using recursion (recursion means that a function is calling himself ...)
You should first show what you've done so far, and if you get stuck, you post your code and ask specific questions about it ...
In fact you could use a simple for-loop, but you could make your code even shorter by using recursion (recursion means that a function is calling himself ...)
Last edited by tux4life; Apr 4th, 2009 at 5:39 am.
"Never argue with idiots, they just drag you down to their level and then beat you with experience."
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Use a for loop that multiplies the "i" index with the result.
Like when you calculate the sum of a list of numbers
Like when you calculate the sum of a list of numbers
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In fact it's a very simple program, you only have to use a for loop
(or recursion as I already stated)
You've to make something like a design plan first:
> You get the number where you want to calculate the factorial of from the user (store it in a variable)
> Now you use a for-loop to calculatate the factorial:
- Use for e.g. a for-loop with 'i' as index, you have to set it in such a way that 'i' is always incremented by 1 after a loop has been made ...
- The loop has to run n-times (where 'n' has to be the number where you want to calculate the factorial of)
- Now you declare a temporary variable (called 'result' for instance) and in each step of the for-loop you're multiplying it by 'i' (the index)
(
- After the loop has finished you've the factorial ...
Note: Factorials are quickly becoming big so it might be useful to use an unsigned long for storing the factorial ...
(or recursion as I already stated)
You've to make something like a design plan first:
> You get the number where you want to calculate the factorial of from the user (store it in a variable)
> Now you use a for-loop to calculatate the factorial:
- Use for e.g. a for-loop with 'i' as index, you have to set it in such a way that 'i' is always incremented by 1 after a loop has been made ...
- The loop has to run n-times (where 'n' has to be the number where you want to calculate the factorial of)
- Now you declare a temporary variable (called 'result' for instance) and in each step of the for-loop you're multiplying it by 'i' (the index)
(
result = result * i; or result *= i; )- After the loop has finished you've the factorial ...
Note: Factorials are quickly becoming big so it might be useful to use an unsigned long for storing the factorial ...
Last edited by tux4life; Apr 4th, 2009 at 7:26 am.
"Never argue with idiots, they just drag you down to their level and then beat you with experience."
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Posting Whiz in Training
all you can do it to solve using a recursive manner
well this solves the major issue . now all u have to do is to fit the bits of code and put them together .
Java Syntax (Toggle Plain Text)
well this solves the major issue . now all u have to do is to fit the bits of code and put them together .
<?php
$data = $_POST['data'];
if(empty($data)) {
echo "byte me" ; }
?>
$data = $_POST['data'];
if(empty($data)) {
echo "byte me" ; }
?>
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Originally Posted by rahul8590 
Java Syntax (Toggle Plain Text)
"Never argue with idiots, they just drag you down to their level and then beat you with experience."
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Posting Whiz in Training
well integers in java can hold a lot bigger values than that infact if i am not wrong its even bigger than the one allocated in c/c++.
well if u still want bigger values then try using float or double.
well if u still want bigger values then try using float or double.
<?php
$data = $_POST['data'];
if(empty($data)) {
echo "byte me" ; }
?>
$data = $_POST['data'];
if(empty($data)) {
echo "byte me" ; }
?>
•
•
Join Date: Feb 2009
Posts: 1,968
Reputation:
Solved Threads: 214
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Originally Posted by rahul8590
well integers in java can hold a lot bigger values than that infact if i am not wrong its even bigger than the one allocated in c/c++.
well if u still want bigger values then try using float or double.
Last edited by tux4life; Apr 4th, 2009 at 7:46 am.
"Never argue with idiots, they just drag you down to their level and then beat you with experience."
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