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How to Make A Character (Char) Uppercase In Rust?

2 minutes read

To make a character uppercase in Rust, you can use the to_ascii_uppercase method provided by the standard library. This method converts the character to its uppercase equivalent if it has one. Here is an example demonstrating how to make a character uppercase in Rust:

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let lower_char = 'a';
let upper_char = lower_char.to_ascii_uppercase();

println!("Uppercase char: {}", upper_char);


In this example, the character 'a' is converted to its uppercase equivalent 'A' using the to_ascii_uppercase method. You can use this method to convert any character to uppercase in Rust.


How to capitalize a char in Rust using standard libraries?

To capitalize a character in Rust using standard libraries, you can use the to_ascii_uppercase method provided by the char type. Here is an example of how you can capitalize a character:

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fn main() {
    let c = 'a';
    let capitalized_char = c.to_ascii_uppercase();
    
    println!("{}", capitalized_char);
}


In this example, the to_ascii_uppercase method is called on the character c, which converts it to its uppercase equivalent ('A' in this case). The capitalized character is then printed to the console.


How to convert a character to uppercase in Rust?

You can convert a character to uppercase in Rust by using the to_ascii_uppercase method provided by the standard library. Here's an example of how to convert a character to uppercase:

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fn main() {
    let lowercase_char = 'a';
    let uppercase_char = lowercase_char.to_ascii_uppercase();
    
    println!("{}", uppercase_char);
}


In this example, the character 'a' is converted to uppercase using the to_ascii_uppercase method, and the result is printed to the console. This will output:

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A



How to change a single char to uppercase in Rust?

You can change a single character to uppercase in Rust by converting the character to a String, changing it to uppercase, and then converting it back to a character. Here is an example code snippet:

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fn main() {
    let mut c = 'a';
    let upper = c.to_string().to_uppercase();
    c = upper.chars().nth(0).unwrap();
    println!("{}", c);
}


This code snippet converts the character 'a' to uppercase and then prints the result. You can change the value of the c variable to any character you want to convert to uppercase.

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