Python Coding challenge - Day 682| What is the output of the following Python Code?

 

Code Explanation:

1. Importing Libraries

import numpy as np

from scipy.optimize import minimize

numpy (np) → used for numerical operations (though here it’s not directly used).

scipy.optimize.minimize → function from SciPy that finds the minimum of a given function.

2. Defining the Function

f = lambda x: (x-3)**2

This defines an anonymous function (lambda function).

Input: x

Output: (x-3)²

So:

At x=3 → f(3) = 0 (minimum point).

The function is a parabola opening upwards.

3. Running the Minimization

res = minimize(f, x0=0)

minimize takes:

f → the function to minimize

x0=0 → starting guess (initial value for the search)

Here, we start from x=0.

The optimizer then iteratively moves toward the point that minimizes f(x).

Since (x-3)² is minimized at x=3, the algorithm should find x=3.

res is an OptimizeResult object containing details:

res.x → solution (minimum point)

res.fun → minimum function value

res.success → whether optimization succeeded

res.message → status

4. Printing the Result

print(round(res.x[0],2))

res.x is an array containing the optimized value of x.

res.x[0] → extracts the first element (the solution).

round(...,2) → rounds the solution to 2 decimal places.

So the output is:

3.0

Final Output

3.0

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