How to use string interpolation to combine strings, integers and doubles
Swift version: 5.0
String interpolation is Swift's way of letting you insert variables and constants into strings. But at the same time, you can also perform simple operations as part of your interpolation, such as changing letter case and basic mathematics. Swift is also smart enough to understand how to bring values into strings, meaning that you can use other strings, integers and floating-point numbers just fine.
Here's an example to get you started:
let name = "Paul"
let age = 35
let longestPi = 3.141592654
let combined = "This person's name is \(name.uppercased()), their age is \(age) so in \(age) years time they'll be \(age + age), and they know π up to \(longestPi)"SPONSOR Tired of wasting time debugging your Swift app? Instabug’s SDK is here to help you minimize your debugging time by providing you with complete device details, network logs, and reproduction steps with every bug report. All data is attached automatically. It only takes a line of code to setup. Get started for free.
Available from iOS 7.0 – learn more in my book
Did this solution work for you? Please pass it on!
Other people are reading…
- How to read a single character from a string
- How to remove a prefix from a string
- How to trim whitespace in a string
- How to calculate the ROT13 of a string
- How to convert a string to lowercase letters
About the Swift Knowledge Base
This is part of the Swift Knowledge Base, a free, searchable collection of solutions for common iOS questions.
