How to get only positive value while subtracting in swift?

Question

I want to get the value of zero while the larger value is subtracted from the smaller one. For eg:

var a = 10
var b = 3
var c = b-a

and it should print c = 0 instead of c = -8

Answer 1

You can use max(b-a, 0), which will return b-a in case the result is positive and 0 otherwise.

let a = 10
let b = 3
let c = max(b-a,0)