Rust program to demonstrate the 'from' trait

Program to demonstrate the 'from' trait

Rust Programming Language

Problem

In this program, we will demonstrate the "from" trait. The "from" trait is used to create a variable from another type of variable.

Input

// Rust program to demonstrate the "from" trait

fn TypeOf<T>(_: &T) {

    println!("{}", std::any::type_name::<T>())

}

fn main() 

{

    let strVar = "hello world";

    let stringVar = String::from(strVar);

    print!("{}, Type: ",strVar);

    TypeOf(&strVar); 

    

    print!("{}, Type: ",stringVar);

    TypeOf(&stringVar); 

}{codeBox}

Output

hello world, Type: &str

hello world, Type: alloc::string::String{codeBox}

Explanation

Here, we created a variable strVar of &str type. Then we created another variable stringVar using the "from" trait using the existing variable strVar. After that, we printed the value of variables and their data type.