Python Coding challenge - Day 680| What is the output of the following Python Code?

 

Code Explanation:

1. Importing Libraries

import matplotlib.pyplot as plt

import numpy as np

matplotlib.pyplot → gives plotting functions (like plt.plot(), plt.show()).

numpy → used for numerical computations, arrays, math functions.

plt and np are just short aliases to make code shorter.

2. Create Evenly Spaced Values

x = np.linspace(0, np.pi, 5)

np.linspace(start, stop, num) creates num evenly spaced numbers between start and stop (inclusive).

Here:

start = 0

stop = np.pi (≈ 3.14159)

num = 5

So, x will be:

[0.         0.78539816  1.57079633  2.35619449  3.14159265]

(these are 0, π/4, π/2, 3π/4, π).

3. Apply the Sine Function

y = np.round(np.sin(x), 2)

np.sin(x) → takes the sine of each value in x.

sin(0) = 0

sin(π/4) ≈ 0.7071

sin(π/2) = 1

sin(3π/4) ≈ 0.7071

sin(π) = 0

So before rounding:

[0.         0.70710678  1.         0.70710678  0.        ]

np.round(..., 2) → rounds each value to 2 decimal places:

[0.   0.71  1.   0.71  0.  ]

4. Convert to List and Print

print(list(y))

y is a NumPy array.

list(y) converts it into a normal Python list.

Output:

[0.0, 0.71, 1.0, 0.71, 0.0]

✅ Final Output

[0.0, 0.71, 1.0, 0.71, 0.0]

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