How to write a program to find the Factorial for a series of number

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Mohamed Rashad 2021-9-25

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https://ww2.mathworks.cn/matlabcentral/answers/1460639-how-to-write-a-program-to-find-the-factorial-for-a-series-of-number

回答： Star Strider 2021-9-25

If I wanted to find the Factorial for 1/1! + 2/2! + 3/3! ...+ n/n!. How to take the series as user input and display the output.?

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Answer 1

Star Strider 2021-9-25

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https://ww2.mathworks.cn/matlabcentral/answers/1460639-how-to-write-a-program-to-find-the-factorial-for-a-series-of-number#answer_794969

在 MATLAB Online 中打开

Take advantage of MATLAB’s vectorisation capability —

N = 10;
ff = (1:N) ./ cumprod(1:N)
ff = 1×25
    1.0000    1.0000    0.5000    0.1667    0.0417    0.0083    0.0014    0.0002    0.0000    0.0000    0.0000    0.0000    0.0000    0.0000    0.0000    0.0000    0.0000    0.0000    0.0000    0.0000    0.0000    0.0000    0.0000    0.0000    0.0000
ffsum = sum(ff)
ffsum = 2.7183