Question

How to find variable type in Rust

Answer 1

fn main() {
    let str = "rust";
    let number = 435;
    let pi = 3.14;
    let f: f32 = 87.341; 
    let ch = 'a';
    let b = true;
    let tpl: (u32, i64, f32) = (12, -74, 1.057);
    let array = [1, 2, 3, 4, 5, 6];
    let vec = vec![1, 2, 3, 4];

    print_type(&str); 
    print_type(&number); 
    print_type(&pi); 
    print_type(&f); 
    print_type(&ch); 
    print_type(&b); 
    print_type(&tpl); 
    print_type(&array); 
    print_type(&vec); 
    print_type(&main); 
}

fn print_type<T>(_: &T) {
    println!("{}", std::any::type_name::<T>())
}





/*
run:

&str
i32
f64
f32
char
bool
(u32, i64, f32)
[i32; 6]
alloc::vec::Vec<i32>
test::main

*/

 

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