E071: A digit doesn't belong in this number's base

Once you write 0x, 0b, or 0o, every digit that follows has to be a valid digit in that particular base:

• Hexadecimal (0x) allows 0-9 and a-f (or A-F).
• Binary (0b) allows only 0 and 1.
• Octal (0o) allows only 0-7.

This error means one of the characters right after the prefix isn’t valid for the base you chose – most often a simple typo:

mut x: int = 0b012;   // ERROR: '2' isn't valid in binarymut y: int = 0o8;     // ERROR: '8' isn't valid in octalmut z: int = 0xZZ;    // ERROR: 'Z' isn't a hex digit

The fix depends on what you actually meant:

• If you mistyped a digit, correct it:

    mut x: int = 0b010;   // fixed

• If you actually wanted a plain decimal number, drop the prefix

entirely:    mut y: int = 8;   // no '0o' needed for an ordinary decimal number

Double-check which base you meant to use, and that every digit you typed is one that base actually has.

Run turf --explain E071 in a terminal to read this again.