What does this Zig snippet output?

1const std = @import("std");
2pub fn main() void {
3    const U = union(enum) {
4        int: i32,
5        float: f64,
6        none,
7    };
8    const val = U{ .int = 42 };
9    switch (val) {
10        .int => |n| std.debug.print("int: {d}\n", .{n}),
11        .float => |f| std.debug.print("float: {d}\n", .{f}),
12        .none => std.debug.print("none\n", .{}),
13    }
14}