• imports:

const std = @import("std");

• globals:

// global variables.const x = 1234;

• comments:

//! Top level comments are setup using //!//! This module provides functions for retrieving the current date and//! time with varying degrees of precision and accuracy. It does not//! depend on libc, but will use functions from it if available.

• main:

pub fn main() !void {    const stdout = std.io.getStdOut().writer();    try stdout.print("Hello, {}!\n", .{"world"});    // Comments in Zig start with "//" and end at the next LF byte (end of line).    // The below line is a comment, and won't be executed.

• ints:

    // integers    const one_plus_one: i32 = 1 + 1;    print("1 + 1 = {}\n", .{one_plus_one});

• floats:

    // floats    const seven_div_three: f32 = 7.0 / 3.0;    print("7.0 / 3.0 = {}\n", .{seven_div_three});

• bools:

    // boolean    print("{}\n{}\n{}\n", .{        true and false,        true or false,        !true,    });

• optionals:

    // optional    var optional_value: ?[]const u8 = null;    assert(optional_value == null);    print("\noptional 1\ntype: {}\nvalue: {}\n", .{        @typeName(@TypeOf(optional_value)),        optional_value,    });    optional_value = "hi";    assert(optional_value != null);    print("\noptional 2\ntype: {}\nvalue: {}\n", .{        @typeName(@TypeOf(optional_value)),        optional_value,    });

• errors:

    // error union    var number_or_error: anyerror!i32 = error.ArgNotFound;    print("\nerror union 1\ntype: {}\nvalue: {}\n", .{        @typeName(@TypeOf(number_or_error)),        number_or_error,    });    number_or_error = 1234;    print("\nerror union 2\ntype: {}\nvalue: {}\n", .{        @typeName(@TypeOf(number_or_error)),        number_or_error,    });    // It works at global scope as well as inside functions.    const y = 5678;}

• Top level ordering:

// Top-level declarations are order-independent:pub fn g() { f(); }pub fn f() {}

• strings:

test "string literals" {    const bytes = "hello";    assert(@TypeOf(bytes) == *const [5:0]u8);    assert(bytes.len == 5);    assert(bytes[1] == 'e');    assert(bytes[5] == 0);    assert('e' == '\x65');    assert('\u{1f4a9}' == 128169);    assert('💯' == 128175);    assert(mem.eql(u8, "hello", "h\x65llo"));}