From 669d4f7337d43628fd031888d9dc46d22289fcdf Mon Sep 17 00:00:00 2001
From: Adam Millerchip <adam@millerchip.net>
Date: Sun, 26 Dec 2021 13:24:01 +0900
Subject: use const for variables that are never modified

---
 exercises/021_errors.zig  | 2 +-
 exercises/031_switch2.zig | 2 +-
 exercises/033_iferror.zig | 4 ++--
 exercises/063_labels.zig  | 4 ++--
 4 files changed, 6 insertions(+), 6 deletions(-)

diff --git a/exercises/021_errors.zig b/exercises/021_errors.zig
index cbb5ac8..7afeace 100644
--- a/exercises/021_errors.zig
+++ b/exercises/021_errors.zig
@@ -16,7 +16,7 @@ const MyNumberError = error{
 const std = @import("std");
 
 pub fn main() void {
-    var nums = [_]u8{ 2, 3, 4, 5, 6 };
+    const nums = [_]u8{ 2, 3, 4, 5, 6 };
 
     for (nums) |n| {
         std.debug.print("{}", .{n});
diff --git a/exercises/031_switch2.zig b/exercises/031_switch2.zig
index 1b3acdb..d8af6e6 100644
--- a/exercises/031_switch2.zig
+++ b/exercises/031_switch2.zig
@@ -15,7 +15,7 @@ pub fn main() void {
     const lang_chars = [_]u8{ 26, 9, 7, 42 };
 
     for (lang_chars) |c| {
-        var real_char: u8 = switch (c) {
+        const real_char: u8 = switch (c) {
             1 => 'A',
             2 => 'B',
             3 => 'C',
diff --git a/exercises/033_iferror.zig b/exercises/033_iferror.zig
index f281b8d..6ba0c61 100644
--- a/exercises/033_iferror.zig
+++ b/exercises/033_iferror.zig
@@ -29,12 +29,12 @@ const MyNumberError = error{
 const std = @import("std");
 
 pub fn main() void {
-    var nums = [_]u8{ 2, 3, 4, 5, 6 };
+    const nums = [_]u8{ 2, 3, 4, 5, 6 };
 
     for (nums) |num| {
         std.debug.print("{}", .{num});
 
-        var n = numberMaybeFail(num);
+        const n = numberMaybeFail(num);
         if (n) |value| {
             std.debug.print("={}. ", .{value});
         } else |err| switch (err) {
diff --git a/exercises/063_labels.zig b/exercises/063_labels.zig
index cdde229..f82ea6d 100644
--- a/exercises/063_labels.zig
+++ b/exercises/063_labels.zig
@@ -103,7 +103,7 @@ pub fn main() void {
     const wanted_ingredients = [_]u8{ 0, 3 }; // Chili, Cheese
 
     // Look at each Food on the menu...
-    var meal = food_loop: for (menu) |food| {
+    const meal = food_loop: for (menu) |food| {
 
         // Now look at each required ingredient for the Food...
         for (food.requires) |required, required_ingredient| {
@@ -115,7 +115,7 @@ pub fn main() void {
             // (Remember that want_it will be the index number of
             // the ingredient based on its position in the
             // required ingredient list for each food.)
-            var found = for (wanted_ingredients) |want_it| {
+            const found = for (wanted_ingredients) |want_it| {
                 if (required_ingredient == want_it) break true;
             } else false;
 
-- 
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