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in python 3 i don't understand This (or, and, not) please give me some examples also.
1) or 2) and 3) not
4 ответов
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Or evaluates to True if one or both of the expressions are True
- False or True ---> True
- False or False ---> False
- 6>7 or 7>6 ---> True
And evaluates to True only if *both* expressions are True
- True and True ---> True
- False and True ---> True
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Not returns the opposite of a boolean. "not True" becomes False
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You can combine boolean expressions using "and", "or", and "not", which are the same as in the English language.
The expression A and B is true if both A is true and B is true, and false if either is false. (For example, you get wet if it rains and you forgot your umbrella.)
True and True - - - > True
True and False - - - > False
The expression A or B is true if either A is true or B is true, and false if both are false. (For example, school is closed if it is a holiday or it is a weekend.)
True or True - - - > True
True or False - - - > True
False or False - - - > False
The expression not A is true if A is false, and false if A is true. (For example, you are hungry if you have not eaten lunch.)
not True - - - > False
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I will tell the true meaning of and, or and not, it may be more complex than it in action would be.
and, or, not are logical operators.
I will be talking about zero-values, with zero-values I mean any of 0, False, 0.0, None, empty lists [], empty strings "" and other empty iterables.
x and y
returns x, if x is any zero-value, otherwise it returns y.
x or y
returns y if x is any zero-value, otherwise it returns x.
not x
returns False if x is any non-zero-value, returns True if y is any zero-value.