# Ternary Operator In Python or Conditional Operator | One Line if statement

Ternary operator in Python is the equivalent of if else statement. The ternary operatory allows testing a condition in a single line, replacing the multi-line if-else and making the code more compact. It also increases the readability of code. There is no keyword for implementing a ternary operator. Below is the syntax of the ternary operator in Python.

## Syntax for Ternary Operator

Syntax for implementing if else using Ternary operator: In this syntax, whenever the given condition is `True`, statement given in [on_True] get execeuted & whenever the condition is `False`, [on_False] statement gets executed.

`[on_True] if (condition) else [on_False]`

Syntax for implementing if elif else using Ternary operator: In this syntax, when condition1 is `True`, the statement given in [on_True1] gets executed. But when the condition is `False`, the control shifts to else and here condition2 is checked. If condition2 is `True`, then [on_True2] gets executed and if not, the statements in [on_False1] get executed.

`[on_True1] if(condition1) else [on True2] if(condition2) else [on False1]`

## Ways of Implementing Ternary Operator in Python

Let us look at some example codes and methods in which multi-line if-else can be reduced into single line ternary operation using the above syntax.

### a) Simple Method for Implementing Ternary Operators

`#program to compare a & ba, b = 7, 8print("a is less than b") if(a < b) else print("a is greater than b")`
`Output: a is less than b`
`#program to compare a & ba, b = 7, 7print("a is less than b") if(a<b) else print("a is equal to b") if(a == b) else print("b is less than a")`
`Output: a is equal to b`

### b) Ternary Operation Using Tuple

When implementing using Tuplesstatements or the body of if becomes elements of the Tuple enclosed within round brackets and separated by a comma.

Syntax for Ternary Operator using Tuple:

`(on False, on True) [condition]`

Here, `on False` and `on True` are two elements of the tuple. Element at the first index is accessed when the given condition becomes `False` and element at the second index is accessed when the given condition becomes `True`For example,

`#program to check if a student cleared the testscore = 65result = ("Fail", "Pass") [score > 50]print (result)`
`Output: Pass`

Explanation: Since the value in the operand ‘score’ is greater than 50, the second element of the tuple gets printed.

### c) Ternary Operation Using List

While using Listsstatements are the elements of the list enclosed within square brackets and separated by a comma.

Syntax for Ternary Operation using List:

`[on False, on True][condition]`

Here, `on False` and `on True` are two elements of the list. Element at the first index is accessed when the given condition becomes `False` and element at the second index is accessed when the given condition becomes `True`. For instance,

`#program to check if a student cleared the testscore = 75res = ["Fail", "Pass"][score > 75]print (res)`
`Output: Fail`

Explanation: Since the value in the operand ‘mark’ is 75, the first element of the list gets printed.

### d) Ternary Operation Using Dictionary

Dictionaries can also be used to implement the ternary operation. But in this case, statements are stored as values of the keys True & False enclosed within square brackets and separated by a comma.

Syntax for Ternary Operation using List:

`{True: on True, False: on False} [condition]`

Here, ‘on False’ and ‘on True’ are two values of the keys True & False. The value of the first key gets accessed when the given condition becomes `True` and value of the second key gets accessed when the given condition becomes `False`. For instance,

`#program to check if a student cleared the testscore = 76print ({True: "Pass", False: "Fail"} [score > 75])`
`Output: Pass`

### e) Ternary Operation Using Lambda Functions

This will be discussed once we master the Lambda functions module.

## Ternary Operator in Python FAQs

Yes! Ternary operators can be used in Python. They perform the function of if-else, but unlike if-else, ternary operators are single line statements.

In this article, we have discussed the syntax for implementing a ternary operator in Python. The syntax is given below.

`[on_True] if (condition) else [on_False] #for implementing a if-else[on_True1] if(condition1) else [on True2] if(condition2) else [on False1] #for implementing a elif`