freecodecamp--freecodecamp/curriculum/challenges/english/blocks/daily-coding-challenges-python/681cb05adab50c87ddb2e513.md

id, title, challengeType, dashedName

id	title	challengeType	dashedName
681cb05adab50c87ddb2e513	Challenge 2: Base Check	29	challenge-2

--description--

Given a string representing a number, and an integer base from 2 to 36, determine whether the number is valid in that base.

• The string may contain integers, and uppercase or lowercase characters.
• The check should be case-insensitive.
• The base can be any number 2-36.
• A number is valid if every character is a valid digit in the given base.
• Example of valid digits for bases:
  • Base 2: 0-1
  • Base 8: 0-7
  • Base 10: 0-9
  • Base 16: 0-9 and A-F
  • Base 36: 0-9 and A-Z

--hints--

is_valid_number("10101", 2) should return True.

({test: () => { runPython(`
from unittest import TestCase
TestCase().assertIs(is_valid_number("10101", 2), True)`);
}})

is_valid_number("10201", 2) should return False.

({test: () => { runPython(`
from unittest import TestCase
TestCase().assertIs(is_valid_number("10201", 2), False)`)
}})

is_valid_number("76543210", 8) should return True.

({test: () => { runPython(`
from unittest import TestCase
TestCase().assertIs(is_valid_number("76543210", 8), True)`)
}})

is_valid_number("9876543210", 8) should return False.

({test: () => { runPython(`
from unittest import TestCase
TestCase().assertIs(is_valid_number("9876543210", 8), False)`)
}})

is_valid_number("9876543210", 10) should return True.

({test: () => { runPython(`
from unittest import TestCase
TestCase().assertIs(is_valid_number("9876543210", 10), True)`)
}})

is_valid_number("ABC", 10) should return False.

({test: () => { runPython(`
from unittest import TestCase
TestCase().assertIs(is_valid_number("ABC", 10), False)`)
}})

is_valid_number("ABC", 16) should return True.

({test: () => { runPython(`
from unittest import TestCase
TestCase().assertIs(is_valid_number("ABC", 16), True)`)
}})

is_valid_number("Z", 36) should return True.

({test: () => { runPython(`
from unittest import TestCase
TestCase().assertIs(is_valid_number("Z", 36), True)`)
}})

is_valid_number("ABC", 20) should return True.

({test: () => { runPython(`
from unittest import TestCase
TestCase().assertIs(is_valid_number("ABC", 20), True)`)
}})

is_valid_number("4B4BA9", 16) should return True.

({test: () => { runPython(`
from unittest import TestCase
TestCase().assertIs(is_valid_number("4B4BA9", 16), True)`)
}})

is_valid_number("5G3F8F", 16) should return False.

({test: () => { runPython(`
from unittest import TestCase
TestCase().assertIs(is_valid_number("5G3F8F", 16), False)`)
}})

is_valid_number("5G3F8F", 17) should return True.

({test: () => { runPython(`
from unittest import TestCase
TestCase().assertIs(is_valid_number("5G3F8F", 17), True)`)
}})

is_valid_number("abc", 10) should return False.

({test: () => { runPython(`
from unittest import TestCase
TestCase().assertIs(is_valid_number("abc", 10), False)`)
}})

is_valid_number("abc", 16) should return True.

({test: () => { runPython(`
from unittest import TestCase
TestCase().assertIs(is_valid_number("abc", 16), True)`)
}})

is_valid_number("AbC", 16) should return True.

({test: () => { runPython(`
from unittest import TestCase
TestCase().assertIs(is_valid_number("AbC", 16), True)`)
}})

is_valid_number("z", 36) should return True.

({test: () => { runPython(`
from unittest import TestCase
TestCase().assertIs(is_valid_number("z", 36), True)`)
}})

--seed--

--seed-contents--

def is_valid_number(n, base):

    return n

--solutions--

def is_valid_number(n, base):
    allChars = "0123456789abcdefghijklmnopqrstuvwxyz"
    newN = n.lower()

    availableChars = allChars[0:base]

    for char in newN:
        if char not in availableChars:
            return False

    return True