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This article introduces the relevant knowledge of "detailed introduction of operators and expressions in python". In the operation of actual cases, many people will encounter such a dilemma, so let the editor lead you to learn how to deal with these situations. I hope you can read it carefully and be able to achieve something!

Operator

Next we will take a brief look at the various operators and their usage.

Remember that you can evaluate the expression in the given case at any time in the interpreter. For example, to test an expression

2. 3, you can use the interactive Python interpreter prompt

Shortcuts to numerical operation and assignment

Change the order of operation

To make the expression easier to read, we can use parentheses. For example, 2 + (3 * 4) is better than 2 + 3 * 4.

It is easier to understand because the latter also requires you to know the priority of the operator. Like everything else, use parentheses

It should also be moderate (not excessive), and should not be as redundant as (2 + (3 * 4)).

There is an added advantage of using parentheses-it can help us change the order of operations. Again, for example, if you want

I hope you should calculate the addition before calculating the multiplication in the expression, then you can write the expression (2 + 3) * 4.

Relevance

Operators are usually interrelated from left to right. This means that operators with the same precedence will be entered from left to right.

All right, evaluate. Such as 2 + 3 + 4 will be calculated in the form of (2 + 3) + 4.

Expression.

The length (Length) and width (Breadth) of the rectangle are stored in variables with their respective names. We use them and

Use expressions to calculate the area (Area) and perimeter (Perimeter) of a rectangle. We will express length *

The result of breadth is stored in the variable area and printed out using the print function. In the second case

We used the value of the expression 2 * (length + breadth) directly in the print function.

At the same time, you need to notice how beautifully Python prints out the output. Although we are not particularly in Area

Specify a space between is and the variable area, and Python will add it for us so we can get a neat output knot

At the same time, the program becomes easier to read because of this handling (because we don't need the string used for output

Consider the problem of spaces in). This is an example of how Python can make programmers' lives easier and better.

That's all for the detailed introduction of operators and expressions in python. Thank you for reading. If you want to know more about the industry, you can follow the website, the editor will output more high-quality practical articles for you!

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