Recap - Word Counter

Part of the Logic & Flow section of Coddy's Rust journey — lesson 34 of 66.

Challenge

Easy

You will receive a sentence as input. Count how many times each word appears in the sentence and store the counts in a hash map. Then print each unique word along with its count.

Requirements:

Import HashMap from std::collections
Create a mutable hash map with types HashMap<String, i32>
Read the input sentence as a single line
Split the sentence into individual words using .split_whitespace()
For each word, use .entry() with .or_insert(0) to initialize the count to 0 if the word doesn't exist
After using .or_insert(0), increment the count by 1 for that word
After processing all words, iterate over the hash map and print each word with its count in the format: [word]: [count]

Input:

A single line containing a sentence with words separated by spaces (e.g., hello world hello rust world hello)

Output:

One line for each unique word in the format: [word]: [count]
The order of output lines may vary between test runs

Try it yourself

use std::collections::HashMap;
use std::io;

fn main() {
    // Read input sentence
    let mut sentence = String::new();
    io::stdin().read_line(&mut sentence).expect("Failed to read line");
    let sentence = sentence.trim();
    
    // Create a mutable hash map to store word counts
    let mut word_count: HashMap<String, i32> = HashMap::new();
    
    // TODO: Write your code below
    // Split the sentence into words and count each word
    
    
    // Print each word with its count
    
}