rustString interpolation in Rust

String interpolation in Rust is a way to create a string from a combination of literals, variables, and other expressions. It is done using the format! macro. The format! macro takes a format string as its first argument, followed by a comma-separated list of arguments. The format string contains placeholders for the arguments, which are replaced with the values of the arguments when the macro is evaluated.

Code example:

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

println!("{} is {} years old", name, age);

Output

John is 30 years old

Explanation of code parts:

1. let name = "John"; - This line declares a variable called name and assigns it the value of the string "John".
2. let age = 30; - This line declares a variable called age and assigns it the value of the integer 30.
3. println!("{} is {} years old", name, age); - This line uses the format! macro to create a string from the format string "{} is {} years old" and the variables name and age. The placeholders {} in the format string are replaced with the values of the variables name and age, resulting in the string "John is 30 years old" being printed to the console.

Helpful links:

1. https://doc.rust-lang.org/std/macro.format.html
2. https://doc.rust-lang.org/rust-by-example/macros/format.html

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