# Python Supports the Creation of Anonymous functions at Runtime

Yes, Python supports runtime anonymous functions. A function without any name is known as an anonymous function.

**Lambda function Syntax**

lambda parameters: expression

Let’s understand with following single line example for adding two number

```
def add(x, y):
return x + y
print("Summation Value:",add(5, 2))
```

**Output:** ('Summation Value:', 7)

Here function add has one expression to execute therefore we can replace such a single expression by defining anonymous function Lambda.

Normal function in python is declared using def keyword whereas anonymous function is declared using a construct known as lambda.

Let’s rewrite the above example code using Lambda as below

```
sum_number = lambda a, b: a + b
print("Summation Value:",sum_number(5, 2))
```

**Output: **: ('Summation Value:', 7)

This lambda function is invoked run time and returns results based on input provided. Let's go through more relevant commonly asked Quizzes and Definitions to learn **Python Supports the Creation of Anonymous functions at Runtime**.

### Scroll for More Useful Information and Relevant FAQs

## Filter Odd number from the list of mixed even and odd numbers

```
numbers = [13, 90, 17, 59, 21, 60, 5]
odd_list = list(filter(lambda x: (x%2 != 0) , numbers))
print(odd_list)
```

**Output:**

```
[13, 17, 59, 21, 5]
```

**Explanation: **

Here lambda expression lambda x: (x%2 != 0) executed at runtime and return results with odd numbers. Lambda is used here with an inbuilt function **filter** to select only odd numbers from the given list.

Lambda construct can have multiple input arguments with one expression.

## Does Lambda support the inclusion of a return statement?

No. Anonymous only includes expression. It does not include return, assert or pass. It will raise **SyntaxError: invalid syntax** if used with such statements.

Let’s explore with the following program:

```
sum_number = lambda a, b: return a + b
print("Summation Value:",sum_number(5, 2))
```

**Output:** SyntaxError: invalid syntax

**Explanation:** In above example used return statement inside lambda function which cause error as invalid syntax. Lambda function already return return result of expression a + b. We don't need to use return statement here. Let's remove return and re write above code in following way

```
sum_number = lambda a, b: a + b
print("Summation Value:",sum_number(5, 2))
```

**Output:** ('Summation Value:', 7)