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Lambda creates simple anonymous function. It is simple because it can only have one statement in its body. It is anonymous because usually it does not have a name.

The usual use is as we saw earlier when we passed it as a parameter to the map function. However, in the next example we show that you can assign the lambda-function to a name and then you could used that name just as any other function you would define using def.

examples/functional/lambda.py

def dbl(n):
    return 2*n
print(dbl(3))

double = lambda n: 2*n
print(double(3))

6
6