links: [[YDK JS Chapter 2]] --- In computer programming, **string interpolation (or variable interpolation, variable substitution, or variable expansion)** is the process of evaluating the string literal, containing one or more place holders, yielding a result in which placeholders are replaced with their corresponding values An alternative to string interpolation is string concatenation Examples: ``` let age = 26 console.log(`my age is ${age}`) // my age is 26 // ${age} is placeholder // backticks are delimiters ``` ```dart // dart var age = 26 print('my age is $age') // my age is 26 // $age is placeholder ``` --- tags: #fundamentals [source](https://en.wikipedia.org/wiki/String_interpolation)