YogeshChauhan . com

How to concatenate variable with string in Swift?

in Swift on March 2, 2020

String interpolation is a way to construct a new String value from a mix of constants, variables, literals, and expressions by including their values inside a string literal.

You can use string interpolation in both single-line and multiline string literals. Each item that you insert into the string literal is wrapped in a pair of parentheses, prefixed by a backslash ():


let multiplier = 3
let message = "(multiplier) times 2.5 is (Double(multiplier) * 2.5)"
// message is "3 times 2.5 is 7.5"

In the example above, the value of multiplier is inserted into a string literal as (multiplier). This placeholder is replaced with the actual value of multiplier when the string interpolation is evaluated to create an actual string.

The value of multiplier is also part of a larger expression later in the string. This expression calculates the value of Double(multiplier) * 2.5 and inserts the result (7.5) into the string. In this case, the expression is written as (Double(multiplier) * 2.5) when it’s included inside the string literal.

You can use extended string delimiters to create strings containing characters that would otherwise be treated as a string interpolation. For example:


print(#"Write an interpolated string in Swift using (multiplier)."#)
// Prints "Write an interpolated string in Swift using (multiplier)."

To use string interpolation inside a string that uses extended delimiters, match the number of number signs before the backslash to the number of number signs at the beginning and end of the string. For example:


print(#"6 times 7 is #(6 * 7)."#)
// Prints "6 times 7 is 42."
amazon

Most Read

#1 How to check if radio button is checked or not using JavaScript? #2 Solution to “TypeError: ‘x’ is not iterable” in Angular 9 #3 How to add Read More Read Less Button using JavaScript? #4 How to uninstall Cocoapods from the Mac OS? #5 How to Use SQL MAX() Function with Dates? #6 PHP Login System using PDO Part 1: Create User Registration Page

Recently Posted

Jun 16 What are Stored Procedures for SQL Server? Jun 16 What are Class Constants in PHP? Jun 15 A short basic guide on states in React Jun 15 How to define constants in PHP? Jun 15 How to define visibility for a property in PHP? Jun 15 How to use @if and @else in SCSS?

You might also like these

How to CREATE TABLE in SQL with and without using Another Table?SQL/MySQLHow to check if the page is the home page in WordPress?WordPressSocial Media Colors: Sass VariablesMiscSolution to the error “Visual Studio Code can’t be opened because Apple cannot check it for malicious software”MiscSQL GROUP BY StatementSQL/MySQLSome SQL LIKE Operators We Need to Keep in MindSQL/MySQL