Problem 1749. Factorial !

Created by Disha

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<div style = "text-align: start; line-height: 20.4333px; min-height: 0px; white-space: normal; color: rgb(0, 0, 0); font-family: Menlo, Monaco, Consolas, monospace; font-style: normal; font-size: 14px; font-weight: 400; text-decoration: rgb(0, 0, 0); white-space: normal; "><div style="block-size: 21px; display: block; min-width: 0px; padding-block-start: 0px; padding-top: 0px; perspective-origin: 407px 10.5px; transform-origin: 407px 10.5px; vertical-align: baseline; "><div style="font-family: Helvetica, Arial, sans-serif; line-height: 21px; margin-block-end: 9px; margin-block-start: 2px; margin-bottom: 9px; margin-inline-end: 10px; margin-inline-start: 4px; margin-left: 4px; margin-right: 10px; margin-top: 2px; perspective-origin: 384px 10.5px; text-align: left; transform-origin: 384px 10.5px; white-space: pre-wrap; margin-left: 4px; margin-top: 2px; margin-bottom: 9px; margin-right: 10px; "><span style="block-size: auto; display: inline; margin-block-end: 0px; margin-block-start: 0px; margin-bottom: 0px; margin-inline-end: 0px; margin-inline-start: 0px; margin-left: 0px; margin-right: 0px; margin-top: 0px; perspective-origin: 254.5px 8px; transform-origin: 254.5px 8px; unicode-bidi: normal; "><span style="">Calculate the factorial of a non-negative integer without using the built in function</span></span><span style="block-size: auto; display: inline; margin-block-end: 0px; margin-block-start: 0px; margin-bottom: 0px; margin-inline-end: 0px; margin-inline-start: 0px; margin-left: 0px; margin-right: 0px; margin-top: 0px; perspective-origin: 2px 8px; transform-origin: 2px 8px; unicode-bidi: normal; "><span style=""> </span></span><span style="block-size: auto; display: inline; margin-block-end: 0px; margin-block-start: 0px; margin-bottom: 0px; margin-inline-end: 0px; margin-inline-start: 0px; margin-left: 0px; margin-right: 0px; margin-top: 0px; perspective-origin: 28.5px 8px; transform-origin: 28.5px 8px; unicode-bidi: normal; "><span style="font-weight: 700; ">factorial</span></span></div></div></div>

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Solution Stats

435 Solutions
93 Solvers

Last Solution submitted on Sep 08, 2021

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4 Comments

4 Comments

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Frequency Domain on 25 Jul 2013

I dont understand what you wanted to do with your test no.4. why dont you just check our answer against the actual factorial, instead of hard coding (truncated) numbers?

Marcel on 3 Jan 2014

testcase is nok:
6.6895e+198==factorial(120)
ans =
0

Björn on 11 Dec 2015

Use if statement for test 4...

Dyuman Joshi on 8 Mar 2021

Faulty test case has been corrected. Those who have solved with respect to the rounded test case kindly solve the question again. It's a fairly simple one!

Solution Comments

Solution 541155

1 Comment

1 Comment

B. C. on 5 Dec 2014

fail for x=120?! 'isequal(factorial(120),y)' gives me 0...

Solution 438304

1 Comment

1 Comment

Neeraj Badamikar on 5 May 2014

My solution works in Matlab, but fails the last test here.. :(

Solution 301407

1 Comment

1 Comment

Swapnali Gujar on 10 Aug 2013

I am trying to solve this problem and first 2 test cases are passed, but assertion is failing for last test case. I also used the format as 'short eng', here the y_correct is read by Matlab as '6.689500000000000e+198', but my program is calculating answer as '6.689502913449124e+198' for x = 120 and thats why its failing. Any suggestions ?

Solution 292989

1 Comment

1 Comment

Ramy Mohamed on 31 Jul 2013

There is something wrong with the last test; The number are truncated. y_correct should be 6.689502913449135e+198; while in the test it is given as 6.689500000000000e+198

Solution 290276

1 Comment

1 Comment

Jan Orwat on 26 Jul 2013

fake solution, it works until there is a mistake in test 4

Solution 290264

1 Comment

1 Comment

Mohammed Manna on 26 Jul 2013

I KNOW THIS SOLUTION IS CORRECT....STUPID IDE IS NOT ACCEPTING IT....YOU CAN RUN IT ON A STANDALONE MATLAB AND SEE IF IT WORKS!

Solution 290148

1 Comment

1 Comment

Tobias Schäfer on 26 Jul 2013

Nice solution for that rounding problem.

Solution 289341

1 Comment

1 Comment

Evan on 25 Jul 2013

There should be a test in the test suite to catch any uses of "factorial" in the submitted code, as is done here:
http://www.mathworks.com/matlabcentral/cody/problems/498-find-the-kronecker-tensor-product-without-using-kron

Also, is the convention here to round to five significant digits? If so, this should probably be noted in the problem statement.

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Problem 1749. Factorial !

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Problem 1749. Factorial !

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