Convert negative float to positive in JavaScript

Question

How to convert a negative float (e.g. -4.00) to a positive (e.g. 4.00)?

Answer 1

Getting the absolute value: Math.abs()

document.write(Math.abs(7.25));     // 7.25
document.write(Math.abs(-7.25));    // 7.25
document.write(Math.abs(null));     // 0
document.write(Math.abs("Hello"));  // NaN
document.write(Math.abs(7.25-10));  // 2.75

Answer 2

Take the absolute value: Math.abs(-4.00)

Answer 3

(Math.abs(x)) (x * -1.00)

Answer 4

var f=-4.00;

if(f<0)
f=-f;

Answer 5

, ( ), -:

n = -n;

(.. ), abs:

n = Math.abs(n);

Answer 6

* -1

..