NumPy: Create a vector with values ​​ranging from 15 to 55 and print all values ​​except the first and last

NumPy: Basic Exercise-19 with Solution

Write a NumPy program to create a vector with values ​​ranging from 15 to 55 and print all values ​​except the first and last.

Sample Solution :

Python Code :

# Importing the NumPy library with an alias 'np'
import numpy as np

# Creating a NumPy array 'v' containing integers from 15 to 54 using np.arange()
v = np.arange(15, 55)

# Printing a message indicating the original vector 'v'
print("Original vector:")
print(v)

# Printing a message indicating all values of the vector 'v' except the first and last elements using slicing [1:-1]
print("All values except the first and last of the said vector:")
print(v[1:-1]) 

Sample Output:

Original vector:
[15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39
 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54]
All values except the first and last of the said vector:
[16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40
 41 42 43 44 45 46 47 48 49 50 51 52 53]                         

Explanation:

In above code the np.arange() function creates a NumPy array containing values within a specified interval. In this case, it generates an array starting at 15 and ending before 55, with a default step size of 1. This results in an array of integers from 15 to 54.

The print(v[1:-1]) function prints a slice of the array 'v' to the console, starting from the second element (index 1) and ending before the last element (index -1). In Python, negative indices count from the end of the array. The slice v[1:-1] will exclude the first and last elements of the original array, resulting in an output of integers from 16 to 53.

Python-Numpy Code Editor:

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