Lecture 81 :-  Integer To Romans

Converting an integer to its Roman numeral representation is a common coding problem. Roman numerals use combinations of letters from the Latin alphabet to represent numbers. Here's a function in Python to convert an integer to its Roman numeral equivalent:

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def int_to_roman(num):    val = [        1000, 900, 500, 400,        100, 90, 50, 40,        10, 9, 5, 4, 1    ]        syms = [        "M", "CM", "D", "CD",        "C", "XC", "L", "XL",        "X", "IX", "V", "IV", "I"    ]        roman_numeral = ''    i = 0        while num > 0:        for _ in range(num // val[i]):            roman_numeral += syms[i]            num -= val[i]        i += 1        return roman_numeral # Example usage: num = 1994 result = int_to_roman(num) print(result)

Output:

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"MCMXCIV"

In this example, the function int_to_roman takes an integer num as input and iterates through the val (values) and syms (symbols) lists. It repeatedly divides the input number by the value at each index and appends the corresponding symbol to the roman_numeral. It then subtracts the value from the input number and proceeds to the next index. The process continues until the input number becomes zero.

The val and syms lists contain the mappings of basic Roman numerals and their corresponding values. The function starts with the largest Roman numeral and continues with the next smaller numerals, creating the correct representation for the given integer.