Python Coding challenge - Day 500| What is the output of the following Python Code?

 

Code Explanation:

Line 1–2: Defining combine

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def combine(f, g):

    return lambda x: f(g(x))

This function takes two functions, f and g, as arguments.

It returns a new function that takes a value x, applies g(x), and then applies f(...) to the result.

This is called function composition: f(g(x)).

Line 4: Lambda f

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f = lambda x: x * 2

Defines a lambda function that doubles its input.

Line 5: Lambda g

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g = lambda x: x + 3

Defines a lambda function that adds 3 to its input.

Line 6: Combining f and g

h = combine(f, g)

This creates a new function h where:

h(x) = f(g(x)) = (x + 3) * 2

Line 7: Print Result

print(h(4))

Let’s evaluate this:

g(4) → 4 + 3 = 7

f(7) → 7 * 2 = 14

So h(4) → 14

Final Output:

14