Can you explain what the StringBuilder class is and how it is used for working with strings?

In Go, there is no StringBuilder class like in Java, but the strings.Builder type is used for efficient string operations. It allows accumulating strings without creating many intermediate objects, which improves performance during concatenation.

Example of usage:

var builder strings.Builder
builder.WriteString("Hello")
builder.WriteString(", ")
builder.WriteString("World!")
result := builder.String()
fmt.Println(result) // Outputs: Hello, World!

strings.Builder is optimized for sequential string addition and is recommended over regular concatenation using + in loops.