Javascript parse float ignores decimal places

Question

Here is a simple scenario. I want to show the subtraction of two values ​​on my website:

//Value on my websites HTML is: "75,00" var fullcost = parseFloat($("#fullcost").text()); //Value on my websites HTML is: "0,03" var auctioncost = parseFloat($("#auctioncost").text()); alert(fullcost); //Outputs: 75 alert(auctioncost); //Ouputs: 0 

Can someone tell me what I am doing wrong?

Answer 1

This is "By Design." The parseFloat function will only consider parts of a string until it reaches a value other than +, -, a number, an exponent, or a decimal point. When he sees a comma, he stops looking and only considers part "75".

• https://developer.mozilla.org/en/JavaScript/Reference/Global_Objects/parseFloat

To fix this, convert the commas to decimal points.

 var fullcost = parseFloat($("#fullcost").text().replace(',', '.')); 

Answer 2

javascript parseFloat does not accept locale parameter. Therefore, you will need to replace , by .

 parseFloat('0,04'.replace(/,/, '.')); // 0.04 

Answer 3

parseFloat parses the definition of a decimal literal , not your locale, in JavaScript. (For example, parseFloat not supported by the locale.) Decimal literals in JavaScript use . for decimal point.

Answer 4

Why not use globalization? This is just one of the problems you may encounter when you are not using English:

 Globalize.parseFloat('0,04'); // 0.04 

Some stackoverflow links to view:

• JQuery globalization
• Globalization in jQuery not working

Answer 5

As @JaredPar pointed out in his answer , use parseFloat with replacement

 var fullcost = parseFloat($("#fullcost").text().replace(',', '.')); 

Only replacing comma with dot will be fixed. If not , a number over thousands, for example 1.000.000,00 , will lead to an incorrect digit. Therefore you need to replace comma remove dots .

 // Remove all dot's. Replace the comma. var fullcost = parseFloat($("#fullcost").text().replace(/\./g,'').replace(',', '.')); 

Using two substitutions, you can process the data without getting the wrong numbers in the output.

Answer 6

Numbers in JS use a character . (full stop / period) to indicate a decimal point not a , (comma).