Convert negative number in string to negative decimal in JavaScript

Question

I have a string : "-10.456" I want to convert it to -10.465 in decimal (using JavaScript) so that I can compare for greater than or lesser than with another decimal number.

Regards.

Answer 1

The parseInt function can be used to parse strings to integers and uses this format: parseInt(string, radix);

Ex: parseInt("-10.465", 10); returns -10

To parse floating point numbers, you use parseFloat , formatted like parseFloat(string)

Ex: parseFloat("-10.465"); returns -10.465

Answer 2

只需将其传递给Number函数：

var num = Number(str);

Answer 3

Here are two simple ways to do this if the variable str = "-10.123":

#1

str = str*1;

#2

str = Number(str);

Both ways now contain a JavaScript number primitive now. Hope this helps!

Answer 4

In javascript, you can compare mixed types. So, this works:

var x = "-10.456";
var y = 5.5;
alert(x < y) // true
alert(x > y) // false

Answer 5

the shortcut is this:

"-3.30" <--- the number in string form
+"-3.30" <----Add plus sign
-3.3 <----- Number in number type.