Trusted answers to developer questions
How to check if a string is empty in Rust
okwudili onyejiaku
Overview
We can check if a string is empty in Rust by using the is_empty() method. A string is empty if it has no character.
Syntax
string.is_empty()
Syntax for is_empty() method
Parameters
string: This is the string we want to check to see if it is empty or not.
Return value
The value returned is a Boolean value. A true is returned if the string is actually empty. Otherwise, false is returned.
Code
fn main() {
// create some strings
let str1 = "Edpresso";
let str2 = "";
let str3 = "";
let str4 = "Educative is the best platform!";
// print the length of the strings
println!("{}", str1.is_empty());
println!("{}", str2.is_empty());
println!("{}", str3.is_empty());
println!("{}", str4.is_empty());
}Check if a String is empty in Rust
Explanation
In the above code:
- Lines 3–5: We create some strings, some of which are empty and some of which are not.
- Lines 9–12: We use the
is_empty()method, and we check if each of the strings we created are empty. Then we print the result to the console.
RELATED TAGS
string
empty
rust
communitycreator
CONTRIBUTOR
okwudili onyejiaku
RELATED COURSES
View all Courses
Keep Exploring
Related Courses
