area_func/lib.rs
1pub fn area_of_circle() {
2 use std::io;
3 fn main() {
4 let mut input = String ::new();
5 println!("Input radius : ");
6 io::stdin().read_line(& mut input);
7 let input :f32 = input.trim().parse().unwrap();
8 let area :f32= (input*input)*(3.14);
9 println!("Area of circle with radius {} is {}",input,area);
10 }
11}