NumPy: Create a 3X4 array using and iterate over it

NumPy: Basic Exercise-20 with Solution

Write a NumPy program to create a 3X4 array and iterate over it.

Sample Solution :

Python Code :

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

# Creating a NumPy array 'a' containing integers from 10 to 21 and reshaping it into a 3x4 matrix using np.arange() and .reshape()
a = np.arange(10, 22).reshape((3, 4))

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

# Printing a message indicating each element of the array using np.nditer() to iterate through the elements
print("Each element of the array is:")
for x in np.nditer(a):
    print(x, end=" ") 

Sample Output:

Original array:
[[10 11 12 13]
 [14 15 16 17]
 [18 19 20 21]]
Each element of the array is:
10 11 12 13 14 15 16 17 18 19 20 21                         

Explanation:

In the above code np.arange(10,22).reshape((3, 4)) creates a NumPy array containing integers from 10 to 21 using the np.arange() function. It then reshapes the array into a 3x4 matrix using the reshape() method.

for x in np.nditer(a):: This line starts a for loop that iterates over each element in the array 'a' using the np.nditer() function.

Finally print(x, end=" ") prints the current array element (x) followed by a space. The end=" " parameter ensures that the printed elements are separated by a space, rather than the default newline character.

Output: 10 11 12 13 14 15 16 17 18 19 20 21

Pictorial Presentation:

Python-Numpy Code Editor:

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