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Programming-Idioms

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  • Pascal

Idiom #146 Convert string to floating point number

Extract floating point value f from its string representation s

uses sysutils;
f := StrToFloat(s);

raises an exception if s is not the textual representation of a float (e.g. 'foobar')
uses sysutils;
f := s.ToExtended;

* Works correctly in Lazarus IDE v. >= 1.8.0.
* Type Float = Extended
(read-string s)

Uses the Clojure reader to parse a string into a float and is thus platform agnostic.
New implementation...
< > ⌨
programming-idioms.org 
f := StrToFloat(s);
f := s.ToExtended;
(read-string s)
(parse-double s)
(Float/parseFloat s)
float f = std::stof(s);
var f=float.Parse(s);
float f = s.to!float;
f = num.parse(s);
f = String.to_float(s)
read(s,'(g0)')f
read (unit=s,fmt=*) f
f, err := strconv.ParseFloat(s, 64)
read s :: Double
let f = +s
double f = Double.parseDouble(s);

Float f = Float.valueOf(s);
Double f = Double.valueOf(s);
$f = floatval($s);
my $f = $s;
f = float(s)
f = float(s)
s = u'545,2222'
locale.setlocale(locale.LC_ALL, 'de')
f = locale.atof(s)
f = s.to_f
let f = s.parse::<f32>().unwrap();
let f: f32 = s.parse().unwrap();