How to get the Index of Specified Element in an Array in Rust

How to get the Index of Specified Element in an Array in Rust ?

Answer

To get the index of a specified element in an array in Rust, you can use the iter() method and enumerate the elements.


✐ Examples

1 Index of Element 30 in Integer Array

In this example,

  1. We create an integer array arr with values 10, 20, 30, 40, 50.
  2. We call the iter() method on the array to get an iterator over its elements.
  3. We use the enumerate() method to iterate over the elements along with their indices.
  4. For each element and its index, we check if the element is equal to the specified element 30.
  5. If found, we print its index.
  6. If not found, we print a message indicating it's not in the array.

Rust Program

fn main() {
    let arr = [10, 20, 30, 40, 50];
    let specified_element = 30;

    if let Some(index) = arr.iter().position(|&x| x == specified_element) {
        println!("Index of specified element {} is: {}", specified_element, index);
    } else {
        println!("Specified element not found in the array");
    }
}

Output

Index of specified element 30 is: 2

2 Index of Element 60 in Integer Array

In this example,

  1. We create an integer array arr with values 10, 20, 30, 40, 50.
  2. We call the iter() method on the array to get an iterator over its elements.
  3. We use the enumerate() method to iterate over the elements along with their indices.
  4. For each element and its index, we check if the element is equal to the specified element 60.
  5. If found, we print its index.
  6. If not found, we print a message indicating it's not in the array.

Rust Program

fn main() {
    let arr = [10, 20, 30, 40, 50];
    let specified_element = 60;

    if let Some(index) = arr.iter().position(|&x| x == specified_element) {
        println!("Index of specified element {} is: {}", specified_element, index);
    } else {
        println!("Specified element not found in the array");
    }
}

Output

Specified element not found in the array

Summary

In this tutorial, we learned How to get the Index of Specified Element in an Array in Rust language with well detailed examples.


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