freecodecamp--freecodecamp/curriculum/challenges/english/blocks/daily-coding-challenges-python/68b7687dded630607aceccab.md

id, title, challengeType, dashedName

id	title	challengeType	dashedName
68b7687dded630607aceccab	Challenge 45: Perfect Square	29	challenge-45

--description--

Given an integer, determine if it is a perfect square.

• A number is a perfect square if you can multiply an integer by itself to achieve the number. For example, 9 is a perfect square because you can multiply 3 by itself to get it.

--hints--

is_perfect_square(9) should return True.

({test: () => { runPython(`
from unittest import TestCase
TestCase().assertIs(is_perfect_square(9), True)`)
}})

is_perfect_square(49) should return True.

({test: () => { runPython(`
from unittest import TestCase
TestCase().assertIs(is_perfect_square(49), True)`)
}})

is_perfect_square(1) should return True.

({test: () => { runPython(`
from unittest import TestCase
TestCase().assertIs(is_perfect_square(1), True)`)
}})

is_perfect_square(2) should return False.

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

is_perfect_square(99) should return False.

({test: () => { runPython(`
from unittest import TestCase
TestCase().assertIs(is_perfect_square(99), False)`)
}})

is_perfect_square(-9) should return False.

({test: () => { runPython(`
from unittest import TestCase
TestCase().assertIs(is_perfect_square(-9), False)`)
}})

is_perfect_square(0) should return True.

({test: () => { runPython(`
from unittest import TestCase
TestCase().assertIs(is_perfect_square(0), True)`)
}})

is_perfect_square(25281) should return True.

({test: () => { runPython(`
from unittest import TestCase
TestCase().assertIs(is_perfect_square(25281), True)`)
}})

--seed--

--seed-contents--

def is_perfect_square(n):

    return n

--solutions--

import math
def is_perfect_square(n):
    if n < 0:
        return False
    root = int(math.sqrt(n))
    return root * root == n