rustCustom string format in Rust

Rust provides a powerful formatting system for strings, called format!. It allows you to create strings with dynamic content, and is used in a similar way to println!.

Here is an example of using format! to create a string with dynamic content:

let name = "John";
let age = 30;

let message = format!("Hello, my name is {}, and I am {} years old.", name, age);
println!("{}", message);

Output

Hello, my name is John, and I am 30 years old.

Explanation of code parts:

1. let name = "John"; - This line declares a variable called name and assigns it the value of "John".
2. let age = 30; - This line declares a variable called age and assigns it the value of 30.
3. let message = format!("Hello, my name is {}, and I am {} years old.", name, age); - This line uses the format! macro to create a string with dynamic content. The {} symbols are placeholders for the values of the name and age variables.
4. println!("{}", message); - This line prints the message string to the console.

Helpful links:

1. https://doc.rust-lang.org/std/macro.format.html
2. https://doc.rust-lang.org/book/ch08-02-formatting-strings.html

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