Implementation
Haskell

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Be useful.

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Other implementations
import "strconv"
f, err := strconv.ParseFloat(s, 64)
f = s.to_f
import locale
s = u'545,2222'
locale.setlocale(locale.LC_ALL, 'de')
f = locale.atof(s)
f = float(s)
sysutils
f := StrToFloat(s);
let f = s.parse::<f32>().unwrap();
import std.conv;
float f = s.to!float;
f = num.parse(s);
uses sysutils;
f := s.ToExtended;
$f = floatval($s);
let f = +s
float("1.3")
String floatString = "14.5";
float x = Float.parseFloat(floatString);
double y = Double.parseFloat(floatString);
my $f = $s;
read(s,'(g0)')f
read (unit=s,fmt=*) f
var f=float.Parse(s);
float fl = std::stof("1.5");