rust concatenate strings

In Rust, you can concatenate strings using the + operator or the format! macro. Here are examples of both methods:

Using the + operator:

let str1 = "Hello";
let str2 = "World";
let result = str1.to_string() + str2;

Using the format! macro:

let str1 = "Hello";
let str2 = "World";
let result = format!("{} {}", str1, str2);

In the first example, the + operator is used to concatenate the two strings. One of the strings needs to be converted to a String using the to_string() method before concatenation.

In the second example, the format! macro is used to create a new string by combining the two input strings. The {} placeholders are used to specify where the values of str1 and str2 should be inserted.

Both methods will produce the same result, which is the concatenation of the two input strings into the result variable.