For example the 'x'in
if ans*ans*ans != abs(x):
abs(x) where x is an argument for the function abs()
For example ...
x = -123
print(x)
print(abs(x))
From the manual ...
abs(x)
Return the absolute value of a number. The argument may be a plain or long integer or a floating point number. If the argument is a complex number, its magnitude is returned.
See also ...
https://www.daniweb.com/software-development/python/threads/20774/starting-python#post104853
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