White space is not removing from a String

Question

I am removing white space from a string with "trimmingCharacters" but space is not removing .

    let number = "123 456"
    let replaced = number.trimmingCharacters(in: .whitespaces)
     print(username)
     print(replaced)

Answer 1

Use replacingOccurrences(of:with:) method on String, i.e.

let number = "123 456"
let replaced = number.replacingOccurrences(of: " ", with: "")

print(replaced) //Output: 123456

Answer 2

Use String replacingOccurrences

let number = "123 456"
let replaced = number.replacingOccurrences(of: " ", with: "")
print(replaced)

or

Use Filter

let removed = number.filter{!$0.isWhitespace}
print(removed)

Output 123456