Lambda expression learning and pythonlambda expressions in Python

Lambda expression learning and pythonlambda expressions in Python

Lambda is just an expression, and the function is much simpler than def.

The body of lambda is an expression rather than a code block. Only limited logic can be encapsulated in lambda expressions.

Lambda expressions act as a function for fast writing. The definition of a function can be embedded in the code.

Example:

Defines a lambda expression to calculate the sum of three numbers.

Let's look at another example:

Evaluate the factorial of n using lambda expressions.

------------------------------

Lambda expressions can also be used in def functions.

Example:

An action function is defined here and a lambda expression is returned. Lambda expressions obtain the value of variable name x in the upper def scope.

A is the return value of the action function, and a (22) is the lambda expression returned by the action.

Here, def can also be directly written as lambda. As follows: