math.sqrt
Available inall subroutines.
Computes the square root of its argument x
.
Parameters
x
- Floating point value.
Return Value
Upon successful completion, this function returns the square root of x
.
If x
is math.NAN
, a NaN will be returned.
If x
is ±0 or math.POS_INFINITY
,
x
will be returned.
If x
is a finite value < -0 or
math.NEG_INFINITY
, a domain error occurs
and a NaN will be returned.
Errors
If the x
argument is < -0 or math.NEG_INFINITY
,
then fastly.error
will be set to EDOM
.
Example
declare local var.fi FLOAT;declare local var.fo FLOAT;
set var.fi = 9.0;set var.fo = math.sqrt(var.fi);