# Python Lambda

A lambda function is a small anonymous function.

A lambda function can take any number of arguments, but can only have one expression.

## Syntax

lambdaarguments:expression

The expression is executed and the result is returned.

A lambda function that adds 10 to the number passed in as an argument, and print the result:

`x = lambda a : a + 10`

print(x(5))

Lambda functions can take any number of arguments.

A lambda function that multiplies argument a with argument b and print the result:

`x = lambda a, b : a * b`

print(x(5, 6))

A lambda function that sums argument a, b, and c and print the result:

`x = lambda a, b, c : a + b + c`

print(x(5, 6, 2))

## Why Use Lambda Functions?

The power of lambda is better shown when you use them as an anonymous function inside another function.

Say you have a function definition that takes one argument, and that argument will be multiplied with an unknown number:

`def myfunc(n):`

return lambda a : a * n

Use that function definition to make a function that always doubles the number you send in:

`def myfunc(n):`

return lambda a : a * n

mydoubler = myfunc(2)

print(mydoubler(11))

Or, use the same function definition to make a function that always *triples* the number you send in:

`def myfunc(n):`

return lambda a : a * n

mytripler = myfunc(3)

print(mytripler(11))

` `

Or, use the same function definition to make both functions, in the same program:

`def myfunc(n):`

return lambda a : a * n

mydoubler = myfunc(2)

mytripler = myfunc(3)

print(mydoubler(11))

print(mytripler(11))

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