Character and String link

• Character

The variable is used to store a single character value, such as a single digit or a single alphabet. The value assigned to a char variable is enclosed in a single quote(’’) .

Note: Unlike some other languages, a character in Rust takes up 4 bytes rather than a single byte. It does so because it can store a lot more than just an ASCII value like emojis, Korean, Chinese, and Japanese characters.

Example link

The code below defines a character both explicitly and implicitly:

• Explicit Definition

The following code explicitly defines the variable using the char keyword:

  fn main() {
    // explicitly define 
    let char_1:char = 'e';
    println!("character1: {}", char_1); 
}
  

Output

  character1: e
  

Implicit Definition

The following code implicitly defines the character type of the variable by assigning the single value enclosed within single quotes to them.

  fn main() { 
    // implicitly define
    let char_2 = 'a';
    let char_3 = 'b';
    println!("character2: {}", char_2);
    println!("character3: {}", char_3);
}
  

Output

  character2: a
character3: b
  

String link

A string is any sequence of characters enclosed within double quotes (" “).

Example link

The code below defines a string both explicitly and implicitly:

• Explicit Definition

The following code explicitly defines the variable using the &str keyword:

  fn main() {
    // explicitly define 
    let str_1:&str = "Rust Programming";
    println!("String 1: {}", str_1); 
}
  

Output

  String 1: Rust Programming
  

Implicit Definition link

The following code implicitly defines the string type of the variable by assigning the single value enclosed within double quotes to them.

  fn main() { 
    // implicitly define
    let str_2 = "Rust Programming";
    println!("String 2: {}", str_2);
}
  

output:-

  String 2: Rust Programming
  

Quiz link

Test your understanding of Character and String in Rust!