Retrieve the value of the element and combine them together (The parseFloat function may not work as expected

The following code is what I am currently working with:

var num1=$("#num1").val();
//the num1 value is 12.60
//html code for this number <input id="num1" value="12.60" />
num1=parseFloat(num1).toFixed(2);

var num2=$("#num2").text();
//the num2 value is 1.00
//html code for this number <span id="num2">1.00</span>
num2=parseFloat(num2).toFixed(2);

var sum=num1+num2;

console.log(sum);

My expectation is to see 13.60 but the actual output is 12.601.00 (added as a string).

Can anyone point out if I am overlooking something?

javascript

Answer №1

The function parseFloat is functioning correctly, however, you are converting the values to strings explicitly using toFixed, causing the + operator to concatenate the strings. It is recommended to only use toFixed when you want to convert the numbers to strings, such as when outputting to an element.

Answer №2

After running a quick inspection using Firebug, it was observed that the toFixed() method in Firefox outputs a string:

var num = 16.055;
console.log(typeof(num.toFixed(1)));

The result is: string

Therefore, it is recommended to update the second to last line to:

var sum = parseFloat(value1) + parseFloat(value2);

Answer №3

It is my understanding that the toFixed() function returns a string as its data type. When you use the + operator in var addthem=element1+element2;, it behaves as string concatenation due to JavaScript's overloading of the + operator. If either of the operands is a string, the result will be a string value.

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