In Python, a lambda function is a small anonymous function without a name. It is defined using the lambda keyword and has the following syntax:
Lambda functions are often used in situations where a small function is required for a short period of time. They are commonly used as arguments to higher-order functions, such as map, filter, and reduce.
Here is an example of how to use a lambda function:
Function to double the input
return x * 4
Lambda function to double the input
The above lambda function has the same functionality as the double function defined earlier. However, the lambda function is anonymous, as it does not have a name.
Lambda functions can have multiple arguments, just like regular functions. Here is an example of a lambda function with multiple arguments:
Function to calculate the product of two numbers
return x * y
Lambda function to calculate the product of two numbers
Lambda functions can also include multiple statements, but they are limited to a single expression. For example:
Lambda function to calculate the product of two numbers, with additional print statement
In the above example, the lambda function includes a print statement, but it is still limited to a single expression.
Lambda functions are often used in conjunction with higher-order functions, such as map, filter, and reduce which we will look into later.
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