What ways of creating a string, other than simple concatenation, do you know?

In addition to simple string concatenation, there are other ways to create strings:

• String formatting — allows inserting values into a template. For example, in Python it's f"{variable}", in Java — String.format(), in C# — $"{variable}".
• Using StringBuilder (or equivalents) — efficient for multiple string additions, especially in loops, to avoid creating many intermediate objects.
• Join methods — combining a collection of strings with a separator, e.g., String.join(",", list) in Java or " ".join(list) in Python.
• Template engines — in web development, templates are often used where strings are formed with data substitution.

Example in C# using StringBuilder:

var sb = new StringBuilder();
sb.Append("Hello");
sb.Append(" ");
sb.Append("world");
string result = sb.ToString();