rust string code example

Example 1: rustlang string

let mut hello = String::from("Hello, ");

hello.push('w');
hello.push_str("orld!");

Example 2: rust format string

format!("Hello");                 // => "Hello"
format!("Hello, {}!", "world");   // => "Hello, world!"
format!("The number is {}", 1);   // => "The number is 1"
format!("{:?}", (3, 4));          // => "(3, 4)"
format!("{value}", value=4);      // => "4"
format!("{} {}", 1, 2);           // => "1 2"