CHARACTERS DIFFERENCE AND SIMILARITYSEMUA SAMASEMUA TAK SAMADIFFERENT OF ARRANGEMENTS | SAME OF ARRANGEMENTS

A set containing digits only (0–9) is called Numeric or Digits-Only (and in computing/data entry contexts, Numeral or Digit-based).

Character Set Comparison

Character Set Name	Allowed Characters	Examples	Typical Applications
Numeric / Digits-Only	0–9	123456, 90210	PINs, ZIP codes, phone numbers, phone OTPs
Alphabetic	A–Z, a–z	John, Jakarta	First/last name fields, dictionary terms
Alphanumeric	A–Z, a–z, 0–9	Pass2026, BK1234AB	License plates, serial numbers, password rules

Key Terminology Details

1. Numeric

• Scope: Standard Arabic numerals (0, 1, 2, 3, 4, 5, 6, 7, 8, 9).
• Validation: Rejects all letters, spaces, and special symbols.
• Standard Regex: ^[0-9]+$ or ^\d+$
• Common Use Cases:
  • Authentication: 4-digit or 6-digit PIN codes, OTP (One-Time Password) SMS codes.
  • Identification: Social security numbers, national identity numbers, bank account numbers.
  • Data Entry Controls: Phone number fields, postal codes, credit card numbers.

2. Numeric vs. Integer/Decimal

• Numeric String: A sequence of digit characters processed as text (e.g., "00123" retains its leading zeros).
• Mathematical Number (Integer/Float): Value representation that allows operational math (e.g., 123), decimal points (.), or sign symbols (+, -).