How to Convert String into Float in JavaScript

How to convert string into float in JavaScript?

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(",", "."));

How to convert string to float in javascript without parseFloat or casting?

You could use an implicid type casting with an unary plus +.

var string = "43.44",    number = +string;    console.log(number);console.log(typeof number);

How to convert an array of strings to float in Javascript

Assuming you have an array in a string format, you can use the following regex to match all the decimals and then use .map(Number)

const str = "['6.35', '2.72', '11.79', '183.25']",      array = str.match(/\d+(?:\.\d+)?/g).map(Number)
console.log(array)

Convert string to either integer or float in javascript

That's how I finally solved it. I didn't find any other solution than to add the variable type to the variable ...

var obj = { a: '2', b: '2.1', c: '2.0', d: 'text'};// Explicitly remember the variable typefor (key in obj) {  var value = obj[key], type;  if ( isNaN(value) || value === "" ) {    type = "string";  }  else {    if (value.indexOf(".") === -1) {      type = "integer";    }    else {      type = "float";    }    value = +value; // Convert string to number  }  obj[key] = {    value: value,    type: type  };}document.write("<pre>" + JSON.stringify(obj, 0, 4) + "</pre>");

How to parse float with two decimal places in javascript?

You can use toFixed() to do that

var twoPlacedFloat = parseFloat(yourString).toFixed(2)

Convert Object property value into float

 data = data.map(({ a, b, c }) => ({ a: parseFloat(a), b: parseFloat(b), c: parseFloat(c) }));

or more general:

 data = data.map(entry => 
   Object.entries(entry).reduce(
       (obj, [key, value]) => (obj[key] = parseFloat(value), obj), 
       {}
   )
 );

Convert float to string with at least one decimal place (javascript)

If you want to append .0 to output from a Number to String conversion and keep precision for non-integers, just test for an integer and treat it specially.

function toNumberString(num) { 
  if (Number.isInteger(num)) { 
    return num + ".0"
  } else {
    return num.toString(); 
  }
}

Input  Output
3      "3.0"
3.4567 "3.4567"

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