--description--

Given a string representing a hexadecimal number (base 16), return its decimal (base 10) value as an integer.

Hexadecimal is a number system that uses 16 digits:

Here's a partial conversion table:

--hints--

hex_to_decimal("A") should return 10.

({test: () => { runPython(`
from unittest import TestCase
TestCase().assertEqual(hex_to_decimal("A"), 10)`)
}})

hex_to_decimal("15") should return 21.

({test: () => { runPython(`
from unittest import TestCase
TestCase().assertEqual(hex_to_decimal("15"), 21)`)
}})

hex_to_decimal("2E") should return 46.

({test: () => { runPython(`
from unittest import TestCase
TestCase().assertEqual(hex_to_decimal("2E"), 46)`)
}})

hex_to_decimal("FF") should return 255.

({test: () => { runPython(`
from unittest import TestCase
TestCase().assertEqual(hex_to_decimal("FF"), 255)`)
}})

hex_to_decimal("A3F") should return 2623.

({test: () => { runPython(`
from unittest import TestCase
TestCase().assertEqual(hex_to_decimal("A3F"), 2623)`)
}})

def hex_to_decimal(hex):

    return hex

def hex_to_decimal(hex):

    return int(hex, 16)