Swift if conditional: Is 'comma' like 'AND'?

I'm working through the Swift tutorial and at one point, an if condition is evaluated where a comma , separates two conditions. Is this the same like an AND operator? As in:

var a = 3
var b = 6

var c = 9
var d = 15

if a < b &&  d > c {
    print("yes")
}

if a < b,  d > c {
    print("yes")
}

Both cases return yes.