How to convert string into float in JavaScript

Question

I am trying to parse two values from a datagrid  The fields are numeric  and when they have a comma  ex  554 20   I can t get the numbers after the comma  I ve tried parseInt and parseFloat  How can I do this

User · Answer

Have you ever tried to do this   p  var str    3 8  ie alert    str    0 2        string  will cast string into float   Handy   So in order to solve your problem  you can do something like this   var floatValue     str replace

User · Answer

GusDeCool or anyone else trying to replace more than one thousands separators  one way to do it is a regex global replace   foo g   Just remember that   is a metacharacter  so you have to escape it or put it in brackets     or        Here s one option   var str    6 000 000   str replace      g

User · Answer

Try   x000D   x000D  let str   554 20   x000D  let float    str replace           x000D  let int   str split      map x  gt  x   x000D   x000D  console log  float int    x000D   x000D   x000D

User · Answer

If you extend String object like this    String prototype float   function        return parseFloat this replace                     you can run it like this   554 20  float    gt  554 20   works with dot as well   554 20  float    gt  554 20  typeof  554 20  float    gt   number

User · Answer

Replace the comma with a dot    This will only return 554   var value   parseFloat  554 20     This will return 554 20   var value   parseFloat  554 20     So in the end  you can simply use   var fValue   parseFloat document getElementById  textfield   value replace             Don t forget that parseInt   should only be used to parse integers  no floating points   In your case it will only return 554  Additionally  calling parseInt   on a float will not round the number  it will take its floor  closest lower integer      Extended example to answer Pedro Ferreira s question from the comments   If the textfield contains thousands separator dots like in 1 234 567 99 those could be eliminated beforehand with another replace   var fValue   parseFloat document getElementById  textfield   value replace     g     replace

User · Answer

If they re meant to be separate values  try this   var values    554 20  split      var v1   parseFloat values 0   var v2   parseFloat values 1     If they re meant to be a single value  like in French  where one-half is written 0 5   var value   parseFloat  554 20  replace

User · Answer

If someone is looking for a way to parse float from an arbitrary string  it can be done like that  function extractFloat text      const match   text match   d         d        return match  amp  amp  match 0     extractFloat  some text with float 5 25      5 25

User · Answer

You can use this function  It will replace the commas with     and then it will parseFlaot the value and after that it will again adjust the commas in value      function convertToFloat val            if  val                      if  val indexOf          -1                  val replace                       val   parseFloat val               while     d    d 3    test val toString                       val   val toString   replace    d    d 3       1            2                                    return val

User · Answer

I had the same problem except I did not know in advance what were the thousands separators and the decimal separator  I ended up writing a library to do this  If you are interested it here it is   https   github com GuillaumeLeclerc number-parsing

[javascript] How to convert string into float in JavaScript?

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