What is used to express not equal in python?

It does not mean what to use to express it in python. It is very simple and widely used.

Recommended manual: Python basic introductory tutorial

In the Python language, use! = means not equal. We understand it through the following simple example:

>>> x=3
>>> y=4
>>> if x !=y:
print(x+y)
else:
print(x-y)
7

In the above example, variables x and y are assigned values ​​first, and then the if statement is used to determine whether x and y are equal. If they are not equal, x y is printed. value; if equal, print the value of x - y. Obviously, x is not equal to y, and the result is the value of x y, which is 7. In the above example, != is the inequality symbol, which is formed by! Used in combination with =.

>>> 10 !=10
False
>>> 10 != 11
True
>>> a=[1,2]
>>> b=[2,3]
>>> a !=b
True

We use Python to verify that 10 is not equal to 10. The returned result is that 10 is not equal to 11. The result returns True to verify whether the a list and the b list are equal. The same return is False because they themselves are not equal. !
So far, we have mastered how to express inequality in Python, which is expressed by !=. Not only can it determine whether two numbers and lists are equal, it can also verify whether two strings, tuples, dictionaries, or sets are equal!

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