Swift4

Question

For example, i have a variable:
var a = "feres"
and a set:
var b:set = ["david","james"]
do i can add a variable to the set like this:
var a = "feres"
var b :set =["david","james"]
for a in b {
print ("\(a")
}

Answer 1

No you're just going to print the elements of b. Try this:
var a = "feres"
var b = ["david","james"]
b.append(a)
print(b)
//david, james,feres
Or with a set:
var c:Set = ["a","b"]
c.update(with: a)
print(c)
//a, b,feres