pub fn add_and_sub_fn(value_1 : i32 , value_2 : i32) {
    if value_1 > value_2 {
    println!("The sum of value_1 {} and value_2 {} is {}",value_1,value_2,(value_1 + value_2));
    } //add value_1 to value_2
    else {
    println!("The subtraction of value_1 {} from value_2 {} is {}",value_1,value_2,(value_1 - value_2));
    } //subtract value_1 from value_2
    }