Converts an integer to its roman numeral representation.
Accepts value between 1
and 3999
(both inclusive).
for
loop to iterate over the values in lookup
.divmod()
to update num
with the remainder, adding the roman numeral representation to the result.def to_roman_numeral(num):
lookup = [
(1000, 'M'),
(900, 'CM'),
(500, 'D'),
(400, 'CD'),
(100, 'C'),
(90, 'XC'),
(50, 'L'),
(40, 'XL'),
(10, 'X'),
(9, 'IX'),
(5, 'V'),
(4, 'IV'),
(1, 'I'),
]
res = ''
for (n, roman) in lookup:
(d, num) = divmod(num, n)
res += roman * d
return res
to_roman_numeral(3) # 'III'
to_roman_numeral(11) # 'XI'
to_roman_numeral(1998) # 'MCMXCVIII'
Python, Math
Returns the sum of the powers of all the numbers from start
to end
(both inclusive).
Python, Math
Initializes a list containing the numbers in the specified range where start
and end
are inclusive and the ratio between two terms is step
.
Python, Math
Calculates the Hamming distance between two values.