What does this Zig snippet output?

1const std = @import("std");
2pub fn main() void {
3    const x: ?u32 = null;
4    const y: u32 = x orelse blk: {
5        const fallback: u32 = 10 * 5;
6        break :blk fallback;
7    };
8    std.debug.print("{d}\n", .{y});
9}