Rust Tutorials

How to get all the possible K length Substrings in a String in Rust

How to get all the possible K length Substrings in a String in Rust ?

Answer

To get all possible K length substrings of a string in Rust, you can use nested loops to iterate through each possible substring.

✐ Examples

1 All Substrings of Length 3 in 'Hello World'

In this example,

We create a string str with a value of "Hello World".
We initialize an empty vector substrings to store all substrings of length 3.
We use nested loops to iterate through each possible start and end index for the substring.
Within the loops, we extract the substring using &str[i..j] and add it to the substrings vector.
Finally, we print the substrings vector.

Rust Program

fn main() {
    let str = String::from("Hello World");
    let k = 3;
    let mut substrings: Vec<String> = Vec::new();
    for i in 0..=str.len() - k {
        for j in i..i + k {
            substrings.push(str[i..j + 1].to_string());
        }
    }
    println!("All substrings of length {}: {:?}", k, substrings);
}

Output

All substrings of length 3: ["Hel", "ell", "llo", "lo ", "o W", " Wo", "Wor", "orl", "rld"]

Summary

In this tutorial, we learned How to get all the possible K length Substrings in a String in Rust language with well detailed examples.

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