Is it possible to have dynamic strings in Zig?

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Yes, it is possible to have dynamic strings in Zig.

Zig provides two main types of strings: fixed-length strings and resizable strings. Fixed-length strings have a specific size that is determined at compile time, while resizable strings can grow or shrink dynamically at runtime.

Here is an example of creating a resizable string and appending to it:

const std = @import("std");

var builder = std.heap.ManagedStringBuilder.init(std.heap.page_allocator);
defer builder.deinit();

builder.append("Hello, ");
builder.append("world!");

var str = builder.to_string();
std.debug.print("Resized string: {}\n", .{str});

In this example, we first initialize a ManagedStringBuilder with a page allocator from the standard library. We use append() to add two separate strings to the builder, and then we call to_string() to get a []u8 slice representing the final string.

Note that ManagedStringBuilder uses a heap allocator, so you need to ensure the memory is properly managed by calling deinit().