What does 'string interpolation' allow you to do?

String interpolation is a programming technique that allows you to insert variables and expressions directly into a string. This makes it easier to construct dynamic strings that include the current values of variables, improving code readability and maintainability.

For instance, if you have a variable that contains a user’s name, string interpolation enables you to seamlessly incorporate that variable into a greeting message without the need for additional string concatenation or formatting functions. This typically involves using specific syntax or delimiters in the programming language to denote where the variable should be placed within the string.

This approach is particularly useful in scenarios where the string content needs to change based on the values of variables, such as generating messages, building SQL queries, or formatting output for display. In contrast, options that refer to replacing strings with numbers, converting strings to arrays, or merging strings do not capture the primary function of string interpolation, which is specifically about integrating variables into string literals.