lambda basics

Question

lambda basics

Accepted Answer

lambda x: x * 2 creates an anonymous function that takes one argument and returns x * 2. Assigning it to double makes it callable as double(7). Lambdas are single-expression functions - they cannot contain statements (no if/else blocks, no for loops, no assignments). The equivalent def: def double(x): return x * 2. Use lambda for short inline functions; use def for anything more complex.