fn main() {
    let x = 3;

    if x < 4 {
        println!("Number less than 4!");
    } else {
        println!("Number equal to or greater than 4!");
    }
}

fn main() {
    let x = 3;

    if number < 4 {
        println!("Number less than 4!");
    } else {
        println!("Number equal to or greater than 4!");
    }
}

--- 
+++ 
@@ -1,7 +1,7 @@
 fn main() {
     let x = 3;
 
-    if number < 4 {
+    if x < 4 {
         println!("Number less than 4!");
     } else {
         println!("Number equal to or greater than 4!");
Fix error in control flow example
