How to Insert an Item at Specific Index in a Vector in Rust - Step by Step Examples

How to Insert an Item at Specific Index in a Vector in Rust ?

Answer

To insert an item at a specific index in a vector in Rust, you can use the insert() method of the Vec type. This method allows you to insert an element at the specified index in the vector.

✐ Examples

1 Insert an Integer at Specific Index in a Vector

In this example,

Create a mutable vector of integers using the vec! macro.
Declare an integer variable to insert into the vector.
Use the insert() method to insert the integer at the desired index.
After insertion, you can verify the contents of the vector.

Rust Program

fn main() {
    // Create a mutable vector of integers
    let mut numbers = vec![1, 2, 3, 4, 5];
    
    // Declare an integer to insert
    let new_number = 10;
    
    // Index to insert
    let index = 2;
    
    // Insert the integer at the desired index
    numbers.insert(index, new_number);
    
    // Print the updated vector
    println!("{:?}", numbers);
}

Output

[1, 10, 2, 3, 4, 5]

2 Insert a String at Specific Index in a Vector

In this example,

Create a mutable vector of strings using the vec! macro.
Declare a string variable to insert into the vector.
Use the insert() method to insert the string at the desired index.
After insertion, you can verify the contents of the vector.

Rust Program

fn main() {
    // Create a mutable vector of strings
    let mut words = vec!["apple", "banana", "orange"];
    
    // Declare a string to insert
    let new_word = "grape";
    
    // Index to insert
    let index = 1;
    
    // Insert the string at the desired index
    words.insert(index, new_word);
    
    // Print the updated vector
    println!("{:?}", words);
}

Output

["apple", "grape", "banana", "orange"]

Summary

In this tutorial, we learned How to Insert an Item at Specific Index in a Vector in Rust language with well detailed examples.

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How to Insert an Item at Specific Index in a Vector in Rust - Step by Step Examples

How to Insert an Item at Specific Index in a Vector in Rust ?

Answer

✐ Examples

1 Insert an Integer at Specific Index in a Vector

Rust Program

Output

2 Insert a String at Specific Index in a Vector

Rust Program

Output

Summary

More Rust Vectors Tutorials