Printing

Here is the shortest way to print a string

_=&@import("std").posix.write(1,"Hello!");

And the shortest way to print anything that isn't a string. io.getStdOut() has been removed in the latest revision of zig. This no longer works:

// _=&@import("std").io.getStdOut().writer().print("{}",.{12345});

Try this instead:

const s=@import("std");_=&s.posix.dup2(1,2);s.debug.print("{}\n",.{i});

Or this (invalid after Zig 0.15.1) if you need your solution to crash without printing an error message to stdout:

_=&@import("std").fs.File.stdout().deprecatedWriter().print("{}\n",.{i});

Note that the string printer, posix.write, takes a number as its first argument. If the number is 2, it prints to stderr, which code.golf ignores, so this can be used for conditional printing. Passing any number other than 1 or 2 crashes the program.

Variable declarations

When declaring more than one variable of the same type, it is often good to avoid declaring the type each time.

var a:u8=0;var b:u8=0;

vs.

var a:u8=0;var b=a;

Usize

Don't declare a variable as usize, u64 is the same thing

var x:usize=0;
var x:u64=0;