01234

01234 is a five-character string composed of the digits 0, 1, 2, 3, and 4. As a decimal number, the leading zero is not significant, and the value is 1234. When treated strictly as text, it is a fixed-width code or identifier.

In mathematics and education, 01234 is commonly used as an example of a simple digit sequence and to illustrate place value, counting from zero to four, and the idea of fixed-width formatting.

In computing, leading zeros can carry implications. In many programming languages, a numeric literal that begins with a zero is interpreted as octal (base-8). For example, 01234 is the octal representation of decimal 668 in languages that support this syntax, such as C, C++, and Java. In Python 3, such a literal would be a syntax error; octal literals use the 0o prefix (0o1234). Outside of literal numbers, 01234 may be treated simply as a string or as a code.

Applications include fixed-width identifiers, account or product codes, or sample postal codes in documentation and testing. The sequence is sometimes used in teaching and demonstrations to show uniform formatting and zero-padding.