Q: Is SQRT(n) possible in a POSIX compliant shell? A: Yes within limits.
Hi all...
This is just a fun project to see if it is possible to get a square root of a positive integer from 1 to 9200000 to 6 decimal places on a 64 bit architecture machine.
It is coded around dash and the results show the values from 0 to 10000.
Complex numbers can easily be catered for by taking the absolute value of the negative integer and placing the letter i at the end of the result(s).
Enjoy ripping it apart...
Results for numbers 0 to 10000 timed. OSX 10.14.6, default bash terminal.
Last edited by wisecracker; 10-10-2019 at 03:02 PM..
Reason: Timer was wrong reset for dash.
This User Gave Thanks to wisecracker For This Post:
Hi!
when i'm trying to compile this lite example
on my linux machine I'll get errors and i don't know why..
#include <stdio.h>
#include <math.h> /* needed by sqrt() */
int main()
{
printf("%f", sqrt(10.0));
return (0);
}
this is the error:
/tmp/cc33hNVHK.o: In function... (1 Reply)
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Hi,
i have a the following script:
#!/bin/bash
a=3
b=9
let "c= b*a"
let "d=sqrt $c "
echo $d
But when i execute the code, it gives me the an error saying:
line 5: let: d=sqrt 27 : syntax error in expression (error token is "27 ")
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Hi,
i want to check if a variable var1 is not a or b or c
pseudo code:
If NOT (var1 = a or var1 = b or var1 = c)
then
...
fi
I want to use POSIX complaint Korn shell, and for string comparison
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var="j"
echo "Var : $var"
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This is more of a concensus question than help...
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Hi all,
I am learning POSIX shell programming, and the book I read, uses the let command for integer arithmetic.
I have downloaded and use the shellcheck program on Linux.
This programs says:
In POSIX sh, 'let' is undefined.
See the screenshot attached.
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Hi all...
Apologies for any typos, etc...
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