Question

Find the output of following program: import numpy as np d=np.array([10,20,30,40,50,60,70])
print(d[-4:])

Answer 1

Answer:10,20,30,40

Explanation:

Answer 2

The output of the above program are: 40,50,60,70.

Explanation:

1. The first line of the above program creates an np object of 'numpy array'.
2. The second line of the above program is to create an integer array of variable d and store the value on it.
3. The third line prints the value of the 3rd index to the last index.

It is because, if (:) is placed with an array index then the value is printed with the given index to the last index. for example, if the print statement holds 3: then it will print the value from the third index of the array to the last index of the array. so the 4: prints the value from the fourth index of the array to the last index but in the above code, the print statement holds (-4:) which means (3:) that's why it prints 40 to 70, where 40 is the third index value of the array.

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