rustHow do I use a String Builder in Rust?

String Builder is a type of data structure used to efficiently build strings in Rust. It is used to create a mutable string that can be modified in place.

Example code

let mut s = String::new();
let mut sb = String::new();

sb.push_str("Hello");
sb.push_str(" World!");

s.push_str(&sb);

println!("{}", s);

Output example

Hello World!

Code explanation

• let mut s = String::new();: creates a new empty string
• let mut sb = String::new();: creates a new empty string builder
• sb.push_str("Hello");: adds the string "Hello" to the string builder
• sb.push_str(" World!");: adds the string " World!" to the string builder
• s.push_str(&sb);: adds the contents of the string builder to the string
• println!("{}", s);: prints the contents of the string

Helpful links

• Rust Documentation - String Builder

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