How to get the length of a string in Rust
In Rust, a string's length is determined by the amount of space it takes up in terms of UTF-8 encoded bytes. This is important because different characters can be encoded using different numbers of bytes. To clarify, when measuring the length of a string in Rust, we're looking at the count of UTF-8 bytes used to represent its characters.
Syntax
string.len()
Syntax for len method in Rust
Parameters
string: This is the string whose length we want to get.
Return value
The value returned is a number representing the length of the string specified.
Code
fn main() {// create some stringslet str1 = "Edpresso";let str2 = "Educative";let str3 = "Rust";let str4 = "Educative is the best platform!";// print the length of the stringsprintln!("The length of {} is {}", str1, str1.len());println!("The length of {} is {}", str2, str2.len());println!("The length of {} is {}", str3, str3.len());println!("The length of {} is {}", str4, str4.len());}
Explanation
In the above code:
Lines 3–6: We create some string variables and initialize them.
Lines 9–12: We retrieve the length of each string with the
len()method, and with theprintln!()method, we print the result to the console.
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