sqrt(3m)sqrt(3m)Name
cbrt, sqrt - cube root, square root
Syntax
#include <math.h>
double cbrt(x)
double x;
double sqrt(x)
double x;
float fsqrt(float x)
float x;
Description
The function returns the cube root of x.
The and functions return the square root of x for double and float data types respectively.
Error Due to Roundoff and Other Reasons
The function is accurate to within 0.7 ulps.
The function on this machine conforms to IEEE 754 and is correctly rounded in accordance with the rounding mode in force; the error is less
than half an ulp in the default mode (round-to-nearest). An ulp is one Unit in the Last Place carried.
Diagnostics
The function returns the default quiet NaN when x is negative indicating the invalid operation.
See Alsomath(3m)
RISC sqrt(3m)
Check Out this Related Man Page
SQRT(3) BSD Library Functions Manual SQRT(3)NAME
cbrt, cbrtf, cbrtl, sqrt, sqrtf, sqrtl -- cube root and square root functions
LIBRARY
Math Library (libm, -lm)
SYNOPSIS
#include <math.h>
double
cbrt(double x);
float
cbrtf(float x);
long double
cbrtl(long double x);
double
sqrt(double x);
float
sqrtf(float x);
long double
sqrtl(long double x);
DESCRIPTION
The cbrt(), cbrtf(), and cbrtl() functions compute the cube root of x.
The sqrt(), sqrtf(), and sqrtl() functions compute the non-negative square root of x.
RETURN VALUES
The cbrt(), cbrtf(), and cbrtl() functions return the requested cube root. The sqrt(), sqrtf(), and sqrtl() functions return the requested
square root unless an error occurs. An attempt to take the sqrt() of negative x raises an invalid exception and causes an NaN to be returned
(except that the square root of -0 is valid and equal to -0.)
SEE ALSO fenv(3), math(3)STANDARDS
The cbrt(), cbrtf(), cbrtl(), sqrt(), sqrtf(), and sqrtl() functions conform to ISO/IEC 9899:1999 (``ISO C99'').
HISTORY
The cbrt() function appeared in 4.3BSD. The sqrtl() function appeared in FreeBSD 8.0. The cbrtl() function appeared in FreeBSD 9.0.
BSD March 5, 2011 BSD
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)
I was writing a simple program in linux, which includes sqrt function of c.
I included the math.h. But when I use gcc to compile it, it gave an error message:
/home/murat/tmp/ccOv9upo.o(.text+0x4b): In function `main':
: undefined reference to `sqrt'
collect2: ld returned 1 exit status
I... (2 Replies)
HI,
I have a file which i catenate and using the fields in the file, I would like to get sqrt of it. I tried to man the function but it normally would need an echo as well as bc.
What I am intending to find out is catenate a file where let say
cat a.txt| awk ' {
t= h*($3+$2);
t=... (7 Replies)
hi friends
can any body tell me how can i find sqrt of a any given number without using expr in bash shell
while i am doing i got some errors please take a look
and code is here
x=$((( ( sqrt($1) ) | bc )))
echo $x
$ sh quadratic-eqn-roots.sh 9
quadratic-eqn-roots.sh: line 12: ( (... (6 Replies)
This so basic that it should work.... Any ideas would be appreciared. Using a number directly in the sqrt allows it to compile.
primrose > cat a.c
#include <stdio.h>
#include <math.h>
int main(void)
{
double abcd=9;
printf("%f\n",sqrt(abcd));
}
primrose > gcc a.c
Undefined first... (2 Replies)
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 ")
Can any body tell me what I'm doing wrong? (5 Replies)
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... (3 Replies)