How to Append a String to another String in Rust


How to Append a String to another String in Rust ?

Answer

To append a string to another string in Rust, you can use the format! macro or the push_str method of the String type.



✐ Examples

1 Append " World" to "Hello"

In this example,

  1. We create a string named str1 with a value of "Hello".
  2. We then use the format! macro to append the string " World" to str1.
  3. The format! macro concatenates the two strings and returns a new string.
  4. Finally, we print the concatenated string to the console.

Rust Program

fn main() {
    let str1 = String::from("Hello");
    let concatenated = format!("{} World", str1);
    println!("{}", concatenated);
}

Output

Hello World

2 Append "apple" to "banana"

In this example,

  1. We create a string named mut str2 with a value of "banana".
  2. We then use the push_str method to append the string "apple" to str2.
  3. The push_str method concatenates the two strings and modifies the original str2.
  4. Finally, we print the concatenated string to the console.

Rust Program

fn main() {
    let mut str2 = String::from("banana");
    str2.push_str("apple");
    println!("{}", str2);
}

Output

bananaapple

Summary

In this tutorial, we learned How to Append a String to another String in Rust language with well detailed examples.




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