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Double Factorial

FILE INFORMATION

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doublefactorial.zip
Filename doublefactorial.zip (Download)
Title Double Factorial
Description This program computes double factorial of x, which is like a normal factorial, but -2 in the product instead of -1.
Author Jeff Eaton (jeffeats@gmail.com)
Category TI-89 BASIC Math Programs (Arithmetic)
File Size 422 bytes
File Date and Time Tue Nov 14 00:46:49 2006
Documentation Included? No

REVIEWS

Review
Review by  Nishad Phadke
Reviewed on 2011-02-27
This program is confusing in both its applications and in its intentions. It appears that instead of return (x)(x-1)(x-2)(x-3)... it rather returns (x)(x-2)(x-4)(x-6)..., yet even this function is flawed.

Input: 10

Expected output: 10*8*6*4*2=3840

Actual output: 737280

Overall: 4/10


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ARCHIVE CONTENTS

Archive Contents
Name Size
function.d_underscore_fact.89p   399

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