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How to check if a character is within the ASCII range in Rust
okwudili onyejiaku
Overview
ASCII stands for American Standard Code for Information Interchange. It was the first encoding among others such as the UTF-8, ISO-8859-1, and so on. It is a way to encode a character set used for communication between computers.
A character is said to be in the range of ASCII if it is a number from 0 to 9 or a letter A to Z, or if it's some special character. We can use the is_ascii() method to check if a character is within the ASCII range.
Syntax
character.is_ascii();
Syntax for is_ascii() method
Parameters
character: This is the character we want to check if it is an ASCII in Rust.
Return value
The value returned is a boolean. If the character falls within the ASCII range, a true is returned, otherwise false.
Example
fn main(){
// create some characters
let char1 = 'E';
let char2 = '❤'; // non ASCII
let char3 = '☀'; // non ASCII
let char4 = '7';
let char5 = '!';
// check if characters are ascii
println!("{} is ASCII? {}", char1, char1.is_ascii()); // false
println!("{} is ASCII? {}", char2, char2.is_ascii()); // false
println!("{} is ASCII? {}", char3, char3.is_ascii()); // true
println!("{} is ASCII? {}", char4, char4.is_ascii()); // true
println!("{} is ASCII? {}", char5, char5.is_ascii()); // true
}Check if a character in Rust is ASCII
Explanation
- Lines 3–7: We create some characters, out of which a few are ASCII while the others are not.
- Lines 10–14: We check if the passed character is an ASCII character using the
is_ascii()method, and then print the result to the console screen.
RELATED TAGS
rust
character
ascii
ascii range
communitycreator
CONTRIBUTOR
okwudili onyejiaku
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