What is the string.lines() method in Rust?

Overview

The string.lines() method in Rust returns an iterator over the lines of a string, and enables us to perform various operations on each line.

Syntax

string.lines()
Syntax for lines() method

Parameters

string: This is the string on which we want to apply the string.lines() method.

Return value

The value returned is an iterator containing the lines of the string.

Example

In the code snippet below, we created some strings and then printed each line of the string.

fn main() {
  // create some strings
  let str1 = "Rust is very \ninteresting.
              It is the best!";
  let str2 = "Educative \nis the best";
  // print substrings of string
  for line in str1.lines() {
        println!("{}", line);
  }
  // print each line of the string
  for line in str2.lines() {
        println!("{}", line);
  }
}

Explanation

In the code above:

  • Line 3: We created a string that has some lines. The first line ends with the escape character \n. The second line starts and ends with interesting and the third line ends with some spaces and It is the best!.
  • Line 5: We created another string similar to line 3.
  • Lines 8 and 13: We use the lines() method to get the iterators containing the lines of each of the strings we created. Then, with the for in loop, we print each line of string to the console.

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