Convert negative and positive numbers to positive values

Question

I am getting a dynamic value. Sometimes it comes with positive value and sometimes with negative value. But I always need a positive value. Is there any way to convert all negative or positive values to positive values?

Answer 1

Use Math.abs() :

var x = -25;
alert(Math.abs(x)); //it will alert 25

Here are some test cases from the documentation:

Math.abs('-10');     // 10
Math.abs(-20);       // 20
Math.abs(null);     // 0
Math.abs("string"); // NaN
Math.abs();         // NaN

Answer 2

You can use Math.abs(x) for getting positive value as output. Here 'x' can be any positive or negative value

Answer 3

Here is a fully functional example in addition to the answer above.

$('#amount').change(function() {
    var amount = $(this).val();
    var positive_number = Math.abs(amount);
    if (positive_number > 0) {
        $('#amount').val(positive_number);
    }
});`

Answer 4

By using Math.abs(value) we will be able to do wonder.

Make a number positive

let x =  12;
let y = -12;
let resultx =  Math.abs(x); //  12
let resulty =  Math.abs(y); //  12

Make a number negative

let x =  12;
let y = -12;
let resultx = -Math.abs(x); // -12
let resulty = -Math.abs(y); // -12

Inverting a number

let x =  12;
let y = -12;
let resultx = -(x);         // -12
let resulty = -(y);         //  12