Added comments

src/main.rs

@@ -10,6 +10,7 @@ fn convert_to_c(temp: f32) -> f32 {
 }
 
 fn convert_to_f(temp: f32) -> f32 {
+    //Defining what 5/9 is, then deviding the input by it and adding 32
     const FIVE_DIV_NINE: f32 = 5.0 / 9.0;
     let mut fahrenheit = temp / FIVE_DIV_NINE;
     fahrenheit += 32_f32;
@@ -27,11 +28,16 @@ fn main() {
             .read_line(&mut input)
             .expect("Failed to read line");
         let input = input.trim();
+        //Split the input into to strings, input: Contains the number
+        //and system: Contains if it is celcius or fahrenheit
         let (input,system) = input.split_at(input.len() - 1);
+        //If the input in a number, output it, else, restart loop
         let input: f32 = match input.parse() {
             Ok(num) => num,
             Err(_) => continue,
             };
+        //If the system is know, call the convert function, else,
+        //repeat loop
         match system {
             "C" => println!("{}°C is {:.2}°F", input, convert_to_f(input)),
             "F" => println!("{}°F is {:.2}°C", input, convert_to_c(input)),