Q:

Rust program to check the given HashMap is empty or not

belongs to collection: Rust HashMap Programs

YasminRadwan26
Save to bookmark
|
2022-07-18
|
  183 
0

In this program, we will create two HashMaps and then we will check created maps are empty or not using the is_empty() method.

RUST programming, examples, RUST programming examples,
login and add your own answer to this question

All Answers

YasminRadwan26
2022-07-18
need an explanation for this answer? contact us directly to get an explanation for this answer

Program/Source Code:

The source code to check given HashMap is empty or not is given below. The given program is compiled and executed successfully.

// Rust program to check the given 
// HashMap is empty or not

use std::collections::HashMap;

fn main() 
{
    let mut map1 = HashMap::new();
    let mut map2: HashMap<&str, i32> = [].iter().cloned().collect();
    
    map1.insert("Key1", 101);
    map1.insert("Key2", 102);
    map1.insert("Key3", 103);
    map1.insert("Key4", 104);

    if map1.is_empty()
    {
        println!("The map1 is an empty HashMap");
    }
    else
    {
        println!("The map1 is not an empty HashMap");
    }
    
    if map2.is_empty()
    {
        println!("The map2 is an empty HashMap");
    }
    else
    {
        println!("The map2 is not an empty HashMap");
    }
}

Output:

The map1 is not an empty HashMap
The map2 is an empty HashMap

Explanation:

Here, we created two HashMaps. Then we checked created HashMaps are empty or not using the is_empty() method and printed the appropriate message.

need an explanation for this answer? contact us directly to get an explanation for this answer

total answers (1)

Rust HashMap Programs
This question belongs to these collections

Similar questions

need a help?

find thousands of online teachers now
Rust program to get value using Specified key in H... >>
<< Rust program to find the length of HashMap...