W3schools Javascript Ternary Operator
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Michael Zippo
04.11.2021
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The Python ternary operator allows you to evaluate whether a condition is true or false. The ternary operator takes one line of code, which mean s it’s shorter and more concise than a full if ... other.
Conditional statements, such as statements, allow you to check the flow of your schedule . Code in conditional statements is executed only when a particular condition is (or a set of conditions) is true.
In Python, the most common way to write a conditional statement is to use if. However, the language also offers a way to test a condition on a line: the ternary operator.
This tutorial will discuss, with reference to examples, the basics of conditional declarations and how to use the Python ternary operator.
Python conditionals
When writing a program, you can run a single line or block of code when a condition is met. This is where conditional statements come in handy.
The Python if statement is used to check if a condition is met.
Suppose you create an application that checks if a customer qualifies for a 10% discount at a movie theater. If the customer is 65 years of age or over, he should be given a discount, otherwise no discount should be given. We could build this program using an if ... else statement.
But, if the declarations take at least two lines of code. There is a more concise way to write an if statement if you are only evaluating a few conditions:. The ternary operator in Python
Ternary Python operator
The ternary operator is a type of expression conditional in Python which allows a declaration to be evaluated. Ternary operators perform an action depending on whether this statement is true or false. They are more concise than a traditional if ... else statement
Syntax of the Python ternary statement is as follows:
The ternary conditional operator in Python derives its name from the fact that it accepts three parameters:. if_true, expression, and if_false
ternary operators are typically used to determine the value of a variable. The variable takes the value of "if_true" if declarations of True or "if_false" if declarations of false declaration.
A way of thinking of ternary operators like list Python comprehension to filter a list. Or , you might be thinking what a lambda function is to define a function.
Both understanding lists and lambda functions are more efficient ways of performing an action ( filtering lists and defining a function, respectively). This is just as a ternary operator is a more efficient way to write an if statement.
But, like ternary operators, they should only be used to improve the readability of your code. You shouldn’t go overboard with ternary operators, otherwise your code may be harder to read.
Let’s say we want to give a customer of our theater a discount if they are 65 or over. If a customer is under 65 or over, they are not entitled to a discount. We can check if a customer is eligible to receive a disoutn by using the following code:
Our code returns: false.
In the first line, we declare a Python variables called age. This variable is assigned the value 48. Next, we use a ternary operator to calculate whether the customer is entitled to a discount.
Our ternary operator evaluates the age of expression> = 65 Since age equals 48, it returns false. So the code that appears after executing the other statement.
Next, we display the output of our ternary operator on the console. This returns the value False.
If we compare this example with our last one, you can see that it uses much less lines of code. Our first program used five lines of code and this one used three.
In this example, our ternary operator returns a Boolean Python value (True or False). However, we could allow our ternary operator to return a value.
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Suppose we want to set a specific discount rate depending on whether the user is entitled to a discount . By default, our cinema offers all customers a 5% discount , but seniors (65 and over) are entitled to a 10% discount .
The following program allows us to verify if a customer qualifies for the senior discount . If a customer is not entitled to the senior discount , they receive a 5% discount:
Our code returns: 5. In our code, we assign the value 22 to the age variable.
We use a ternary operator to check if the value of the variable age is less than 65 Since our client is 22, the instruction age < 65 < / em> returns True. this mean s that the customer benefits from a discount rate of 5%. If our client was 65 or older, he receives the 10% discount rate .
However, the ternary operator cannot always be used. If you want to test multiple expressions, you must write a full if statement. This will ensure that your code is readable and easy to understand.
This tutorial has discussed, referring to examples, the basics of the Python ternary operator and how it works. You now have the knowledge to use this operator like a Python pro!
We hope this article has helped you to resolve the problem. Apart from W3schools Javascript Ternary Operator, check other ast Python module-related topics.
