rustHow to format string with padding in Rust

String padding in Rust can be done using the format! macro. The format! macro takes a format string and a list of arguments and returns a String object. The format string can contain special formatting characters that will be replaced with the corresponding argument.

For example, to pad a string with spaces, the {:width$} format can be used. The width argument specifies the total width of the output string, and the $ character indicates that the padding should be done with spaces.

Code example:

let s = "Hello";
let padded = format!("{:10$}", s, 10);
println!("{}", padded);

Output

Hello

Explanation of code parts:

1. let s = "Hello"; - This line declares a variable s and assigns it the value "Hello".
2. let padded = format!("{:10$}", s, 10); - This line uses the format! macro to format the string s with padding. The {:10$} format indicates that the output string should have a total width of 10 characters, and the padding should be done with spaces.
3. println!("{}", padded); - This line prints the padded string to the console.

Helpful links:

1. Rust Documentation - Formatting Strings
2. Rust by Example - Formatting

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