# E0044: unexpected characters in number literal

Letters are allowed in number literals in certain situations, such as in `123n`, `1e6`, and `0xff`. It is an error to include other letters or letters in the wrong spot:

    let big = 9007199254740991N;
    let pi = 3.14l;
    let tau = 2pi;

To fix this error, use the correct letter or remove the extraneous letter:

    let big = 9007199254740991n;
    let pi = 3.14;

Alternatively, use the `*` operator to multiply a variable by a number:

    let tau = 2*pi;

Introduced in quick-lint-js version 0.2.0.

Documentation for other errors