Golang float64 equality esitimation

float.go

var EPSILON float64 = 0.00000001
func floatEquals(a, b float64) bool {
	if ((a - b) < EPSILON && (b - a) < EPSILON) {
		return true
	}
	return false
}

Check it out here
http://play.golang.org/p/drqmxn9CPg

If anyone is curious what the meaning of EPSILON is:

In mathematics (particularly calculus), an arbitrarily small positive quantity is commonly denoted ε

from Wikipedia

why not

var eps float64 = 0.00000001
func floatEquals(a, b float64) bool {
	if math.Abs(a - b) < eps {
		return true
	}
	return false
}

@aleh-null may be this is an answer => Floating-Point Comparison

Why not

var EPSILON float64 = 0.00000001
func floatEquals(a, b float64) bool {
	return (a - b) < EPSILON && (b - a) < EPSILON
}

var EPSILON float64 = 0.00000001
func floatEquals(a, b float64) bool {
        return math.Abs(a - b) < EPSILON
}