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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 a character to its uppercase equivalent, if one exists. Here's an example code snippet that demonstrates how to make a character uppercase in Rust:

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


In this code snippet, we start by defining a lowercase character 'a'. Then, we use the to_ascii_uppercase method to convert this character to its uppercase equivalent. Finally, we print the uppercase character to the console.


How to convert a char to uppercase in Rust?

You can convert a char to uppercase in Rust by using the to_uppercase() method. Here's an example:

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fn main() {
    let c = 'a';
    let uppercased_char = c.to_uppercase().next().unwrap();
    println!("{}", uppercased_char);
}


In this example, the to_uppercase() method is called on the char c, which returns an iterator over the uppercase version of the char. The next() method is then used to get the first uppercase char from the iterator, which is then printed to the console.


What is the recommended method for making a char uppercase in Rust?

In Rust, you can make a char uppercase by using the to_uppercase method. Here is an example of how to use it:

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fn main() {
    let c = 'a';
    let upper_c = c.to_uppercase().next().unwrap();
    println!("{}", upper_c);
}


This code snippet will output 'A', which is the uppercase version of the char 'a'.


How to change the case of a character in Rust?

You can change the case of a character in Rust by using the to_uppercase() and to_lowercase() methods provided by the char type. Here is an example code snippet demonstrating how to change the case of a character:

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fn main() {
    let c = 'a';
    
    let upper_case_c = c.to_uppercase().next().unwrap();
    let lower_case_c = c.to_lowercase().next().unwrap();
    
    println!("Upper case of {} is {}", c, upper_case_c);
    println!("Lower case of {} is {}", c, lower_case_c);
}


In this code snippet, we are first defining a character c with the value 'a'. We then use the to_uppercase() and to_lowercase() methods to convert the character to uppercase and lowercase respectively. Finally, we print out the original character and its corresponding uppercase and lowercase versions.

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