# Ternary operator in Python

Python Methods and Functions

Syntax:

` [on_true] if [expression] else [on_false] `
1. A simple ternary operator method:

 ` # Program for demonstrating the conditional operator ` ` a, b ` ` = ` ` 10 ` `, ` ` 20 `   ` # Copy the value of a in minutes if a & lt; b still copy b ` ` min ` ` = ` ` a ` ` if ` ` a & lt; b ` ` else ` ` b ` ` `  ` print ` ` (` ` min ` `) `

`  Output:  10 `
2. Direct method using tuples, dictionary and lambda

` `

 ` # Python program for demonstration ternary operator ` ` a, b ` ` = ` ` 10 ` `, ` ` 20 `   ` # Use a tuple to select an element ` ` print ` ` ((b, a) [a & lt; b]) ` ` `  ` # Use a dictionary to select an item ` ` print ` ` ({` ` True ` `: a, ` ` False ` `: b} [a & lt; b]) `   ` # lamda is more efficient than the above two methods ` ` # because in the lambda we are sure that ` ` # only one expression will be evaluated unlike ` ` # tuple and dictionary ` ` print ` ` ((` ` lambda ` `: b, ` ` lambda ` `: a) [a & lt; b] ()) `

` `

` Output: 10 10 10 `
3. The ternary operator can be written as a nested if-else:

 ` # Python program to demonstrate nested ternary operator ` ` a, b ` ` = ` ` 10 ` `, ` ` 20 `   ` print ` ` (` ` "Both a and b are equal" ` ` if ` ` a ` ` = ` ` = ` ` b ` ` else ` ` "a is greater than b" ` ` if ` ` a & gt; b ` ` else ` ` "b is greater than a" ` `) `

The above approach can be written like this:

 ` # Python program to demonstrate nested ternary operator ` ` a, b ` ` = ` ` 10 ` `, ` ` 20 `   ` if ` ` a ! ` ` = ` ` b: ` ` if ` ` a & gt; b: ` ` print ` ` (` ` "a is greater than b" ` `) ` ` else ` `: ` ` print ` ` (` ` "b is greater than a" ` `) ` ` else ` `: ` ` print ` ` (` ` "Both a and b are equal "` `) `

`  Output:  b is greater than a `

Important points: