belongs to collection: Rust HashMap Programs
In this program, we will create a HashMap and then we will insert items into HashMap using the insert() function. After that, we will find the length of HashMap using the len() method and print HashMap.
Program/Source Code:
The source code to find the length of HashMap is given below. The given program is compiled and executed successfully.
// Rust program to find the length of 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); println!("Length of HashMap: {}\n",map.len()); println!("HashMap Keys/values:"); for (key, val) in map.iter() { println!("{} -> {}", key, val); } }
Output:
Length of HashMap: 4 HashMap Keys/values: Key2 -> 102 Key3 -> 103 Key1 -> 101 Key4 -> 104
Explanation:
Here, we created a HashMap. Then we inserted the item into HashMap and find the length of HashMap using the len() method and printed the HashMap.
total answers (1)
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Program/Source Code:
The source code to find the length of HashMap is given below. The given program is compiled and executed successfully.
Output:
Explanation:
Here, we created a HashMap. Then we inserted the item into HashMap and find the length of HashMap using the len() method and printed the HashMap.
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