do number four in roman numerals is always be written as IIII instead of IV

In Roman numerals, the number four is correctly written as "IV," not "IIII." The representation "IIII" would be incorrect and redundant in standard Roman numeral notation. Here's why:

1. Roman Numerals Basics: Basic Roman numerals include I (1), V (5), X (10), L (50), C (100), D (500), and M (1000). They are combined in various ways to represent different numbers.

2. Rules for Combination:

   • Smaller numerals are placed before larger ones to show addition.
   • However, when a smaller numeral appears immediately before a larger one, it is subtracted from the larger numeral.

3. Explanation for 'IV':

   • "IV" uses the principle that 1 (I) before 5 (V) signifies subtraction, meaning 5 - 1 = 4.

4. Incorrectness of 'IIII':

   • "IIII" would mean 1 + 1 + 1 + 1 = 4, which is cumbersome and against the efficiency of Roman numerals. It also violates the rule of subtraction before a larger numeral.

So, the correct representation of the number four in Roman numerals is "IV," leveraging the subtractive principle that is typical in this numeral system.