delcare consatnt python
# You can't, just use uppercase to identifydelcare consatnt python
# You can't, just use uppercase to identifyhow to define a constant in python
You can't define a constant in Python unlike in other language, hence you can
just make the variable all CAPS and add a comment using '#' saying that this is
a constant variable.python constant
class CONST(object):
__slots__ = ()
FOO = 1234
CONST = CONST()
print(CONST.FOO) # 1234
CONST.FOO = 4321 # AttributeError: 'CONST' object attribute 'FOO' is read-only
CONST.BAR = 5678 # AttributeError: 'CONST' object has no attribute 'BAR'python e constant
The constant e can be used when you
import math
.
The e refers to euler''s (oiler''s) constant. It is approximately 2.71828.
print(math.e)
#2.718281828459045
It is very useful when you want to make logarithms, as LOG10E has some good uses.
math.e is fixed, and thus does not change.Copyright © 2021 Codeinu
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