Rust program to get value using Specified key in HashMap

Rust | HashMap Example: Write a program to get value using Specified key in HashMap.
Submitted by Nidhi, on October 17, 2021

Problem Solution:

In this program, we will create a HashMap and then we will get value using the specified key in the get() method of HashMap and print the result.

Program/Source Code:

The source code to get value using the Specified key in HashMap is given below. The given program is compiled and executed successfully.

// Rust program to get value 
// using Specified key in HashMap

use std::collections::HashMap;

fn main() 
{
    let mut map = HashMap::new();
    
    map.insert("Key1", 101);
    map.insert("Key2", 102);
    map.insert("Key3", 103);
    map.insert("Key4", 104);

    match map.get(&"Key2") {
      Some(&number) => println!("Value: {}", number),
      _ => println!("Specified key is not found."),
    }
}

Output:

Value: 102

Explanation:

Here, we created a HashMap. Then we got the value using the specified key in the get() method of HashMap and printed the result.

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