hellohellocrate1/
lib.rs

1mod grandsection{
2    pub mod section1{
3        pub fn add(input1:i32,input2:i32)->i32
4        {
5            input1+input2
6        }
7    }
8    pub mod section2{
9        pub fn sub(input1:i32,input2:i32)->i32
10        {
11            input1-input2
12        }
13    }
14}