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diff --git a/18_functions.zig b/18_functions.zig
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-//
-// Functions! We've already seen a lot of one called "main()". Now let's try
-// writing one of our own:
-//
-//     fn foo(n: u8) u8 {
-//         return n+1;
-//     }
-//
-// The foo() function above takes a number "n" and returns a number that is
-// larger by one.
-//
-// If your function doesn't take any parameters and doesn't return anything,
-// it would be defined like main():
-//
-//     fn foo() void { }
-//
-const std = @import("std");
-
-pub fn main() void {
-    // The new function deepThought() should return the number 42. See below.
-    const answer: u8 = deepThought();
-    
-    std.debug.print("Answer to the Ultimate Question: {}\n", .{answer});
-}
-
-//
-// Please define the deepThought() function below.
-//
-// We're just missing a couple things. One thing we're NOT missing is the
-// keyword "pub", which is not needed here. Can you guess why?
-//
-??? deepThought() ??? {
-    return 42; // Number courtesy Douglas Adams
-}