rustHow to format string slice in Rust

String slices in Rust can be formatted using the format! macro. This macro takes a format string and a list of arguments and returns a String object. The format string can contain placeholders for the arguments, which are then replaced with the corresponding values.

Code example:

let name = "John";
let age = 30;
let formatted_string = format!("My name is {}, and I am {} years old.", name, age);

Output

My name is John, and I am 30 years old.

Explanation of code parts:

1. let name = "John"; - This line declares a variable name and assigns it the value "John", which is a string literal.
2. let age = 30; - This line declares a variable age and assigns it the value 30, which is an integer literal.
3. let formatted_string = format!("My name is {}, and I am {} years old.", name, age); - This line uses the format! macro to create a String object from the format string "My name is {}, and I am {} 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.

Helpful links:

1. Rust Documentation - format! macro
2. Rust by Example - format! macro

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