Python ternary operators or conditional expressions are used to evaluate something based on a condition being true or false. See the below The expression syntax of it.
![Python Ternary Operator conditional expressions](https://i2.wp.com/tutorial.eyehunts.com/wp-content/uploads/2020/02/Python-Ternary-Operator-conditional-expressions.png?fit=1024%2C320&ssl=1)
Ternary Operator was added in python version 2.5.
Syntax
a if condition else b
Let’s Understand Ternary Operator syntax:-
First condition
is evaluated, then exactly one of either a
or b
is evaluated and returned based on the Boolean value of condition
. If condition
evaluates to True
, then a
is evaluated and returned but b
is ignored, or else when b
is evaluated and returned but a
is ignored.
This allows short-circuiting because when condition
is true only a
is evaluated and b
is not evaluated at all, but when condition
is false only b
is evaluated and a
is not evaluated at all.
Simple Ternary Operator example in Python
In the example, a variable has value and checking the condition if the value of a is 20 then print true else print false.
a = 20 check = "true" if a == 20 else "false" print(check)
Output: true
Q: Does it possible Python ternary operator without else?
Answer: You can use the single line if syntax to do so.
if <condition>: <some-code>
Q: How to make Python ternary operator multiple conditions?
Answer: For example you want to turn this code into a shorthand line of code.
inpt = input('Age: ') age = int(inpt) if age <= 10: print('Kid') elif age > 10 <= 20: print('Teen') elif age > 20: print('Adult')
Let’s try the short-circuiting. But the above code is more readable.
age = int(input('Age: ')) print('Adult' if age > 20 else 'Kid' if age <= 10 else 'Teen')
Output:
![Python multiple conditions operator](https://i0.wp.com/tutorial.eyehunts.com//wp-content/uploads/2020/02/Python-ternary-operator-multiple-conditions-300x100.png?resize=300%2C100&ssl=1)
Do comment if you have any doubts and questions.
Note: This example (Project) is developed in PyCharm 2018.2 (Community Edition)
JRE: 1.8.0
JVM: OpenJDK 64-Bit Server VM by JetBrains s.r.o
macOS 10.13.6
Python 3.7
All Python Programs are in Python 3, so it may change its different from python 2 or upgraded versions.