const std = @import("std");

pub fn main() !void {
    const stdout_wr = std.io.getStdOut().writer();
    const string = "alphaBETA";
    var lower: [string.len]u8 = undefined;
    var upper: [string.len]u8 = undefined;
    for (string) |char, i| {
        lower[i] = std.ascii.toLower(char);
        upper[i] = std.ascii.toUpper(char);
    }
    try stdout_wr.print("lower: {s}\n", .{lower});
    try stdout_wr.print("upper: {s}\n", .{upper});

    // TODO use https://github.com/jecolon/zigstr
}