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diff --git a/exercises/20_quiz3.zig b/exercises/20_quiz3.zig
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--- a/exercises/20_quiz3.zig
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-//
-// Let's see if we can make use of some of things we've learned so far.
-// We'll create two functions: one that contains a "for" loop and one
-// that contains a "while" loop.
-//
-// Both of these are simply labeled "loop" below.
-//
-const std = @import("std");
-
-pub fn main() void {
-    const my_numbers = [4]u16{ 5, 6, 7, 8 };
-
-    printPowersOfTwo(my_numbers);
-    std.debug.print("\n", .{});
-}
-
-// You won't see this every day: a function that takes an array with
-// exactly four u16 numbers. This is not how you would normally pass
-// an array to a function. We'll learn about slices and pointers in
-// a little while. For now, we're using what we know.
-//
-// This function prints, but does not return anything.
-//
-fn printPowersOfTwo(numbers: [4]u16) ??? {
-    loop (numbers) |n| {
-        std.debug.print("{} ", .{twoToThe(n)});
-    }
-}
-
-// This function bears a striking resemblance to twoToThe() in the last
-// exercise. But don't be fooled! This one does the math without the aid
-// of the standard library!
-//
-fn twoToThe(number: u16) ??? {
-    var n: u16 = 0;
-    var total: u16 = 1;
-
-    loop (n < number) : (n += 1) {
-        total *= 2;
-    }
-
-    return ???;
-}