CODEWITHSUNDEEP
pythonnameerrorsqrt
Not Defined
Not Defined

Reputation: 13

Sqrt is undefined, not sure why

I'm receiving this error and I'm not really sure why considering I've got the import math line there.

NameError: name 'sqrt' is not defined

import math
x = float(input())
y = float(input())
z = float(input())
print('{:.2f} {:.2f} {:.2f} {:.2f}'.format(pow(x, z), pow(x, pow(y, z)), abs(x - y), sqrt(pow(x, z))))

EDIT: I was able to resolve the problem by using math.sqrt but I'm not sure why it's needed when the pow and abs functions work.

Upvotes: 1

Views: 2608

Answers (2)

imxitiz
imxitiz

Reputation: 3987

You have to import sqrt from math. Without importing sqrt you can't use it.
You can try this:

from math import sqrt

Or you can also do:

math.sqrt

pow() and abs() are predefined functions in python but sqrt is not predefined in python. Alternatively, you can use pow(N, 1/2) as it is equivalent to sqrt(N)

Upvotes: 4

0x263A
0x263A

Reputation: 1859

You are currently importing the entire math library and not actually using the sqrt function. You can fix this like so:

import math
x = float(input())
y = float(input())
z = float(input())
print('{:.2f} {:.2f} {:.2f} {:.2f}'.format(pow(x, z), pow(x, pow(y, z)), abs(x - y), math.sqrt(pow(x, z))))

Upvotes: 1

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