What does this Zig snippet output?

1const std = @import("std");
2fn add(a: anytype, b: @TypeOf(a)) @TypeOf(a) {
3    return a + b;
4}
5pub fn main() void {
6    std.debug.print("{d}\n", .{add(@as(u8, 100), 50)});
7    std.debug.print("{d}\n", .{add(@as(i32, -10), 30)});
8}