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iOS Swift Basics Swift Types String Manipulation

Posted by Timothy Poole
Timothy Poole
122 Points

Help with interpolated string

Not fully understanding the second part of this question when it asks to make it an interpolated string after declaring the constant greeting. Please help!

strings.swift 
// Enter your code below

let name = "TJ"

let greeting = "Hi there,"
joe Bell Fenner
joe Bell Fenner
Courses Plus Student 2,646 Points
joe Bell Fenner
joe Bell Fenner
Courses Plus Student 2,646 Points

you have got name all you need to do is add a backslash(name) next to "Hi there," inside the double quotes.

let greeting = "Hi there, a backslash (name)"

"backslash ()" this is known as an interpolation.

good luck bud.

1 Answer

Alex Koumparos
seal-mask
.a{fill-rule:evenodd;}techdegree
Alex Koumparos
Python Development Techdegree Student 36,887 Points
Alex Koumparos
.a{fill-rule:evenodd;}techdegree
Alex Koumparos
Python Development Techdegree Student 36,887 Points

Hi Timothy,

Swift has two main mechanisms for combining strings: concatenation and interpolation.

Here is a simple example of each. First, concatenation:

let first_string = "hello, "
let second_string = "world."
let concatenated = first_string + second_string // note the use of the '+' operator

Second, interpolation:

let name = "timothy"
let greeting = "hello \(name)" // note that swift evaluates any code inside '\()'

Interpolation is usually used to put a value from one variable or constant inside another, but it is much more powerful than that, and can be used to evaluate any code. For example:

let a = 1
let b = 2
let math = "\(a) + \(b) is equal to \(a + b)" // observe that the math is being done inside the \()

Hope that's clear

Alex

Timothy Poole
Timothy Poole
122 Points

Thank you for getting back and have such a detailed explanation!