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What is wrong with my code?

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KMA
KMA 2018-5-3
关闭： MATLAB Answer Bot 2021-8-20
I've included a picture of my prompt. This is what I have so far and I don't understand why it doesn't work. Any tips or guidance is appreciated!
n=1;
while (pi_val<=.000000001)
syms n
pi_val=sqrt(6*symsum(1/n^2, n, 1, Inf))
end

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回答（1 个）

Siyu Guo
Siyu Guo 2018-5-3
You try to read the variable "pi_val" before you have initialized it by a write operation. This is an error, at least for MATLAB 2012 or lower. Besides, I cannot see any reason for the use of this loop.

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