Question

How to get the first digit after the decimal point of a float number in Rust

Answer 1

fn first_decimal_digit(f: f32) -> u32 {
    ((f.abs() * 10.0) as i32 % 10) as u32
}

fn main() {
    let f = 983.6571_f32;
    
    println!("{}", first_decimal_digit(f)); // 6
}


/*
run:

6

*/

 

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