# NumPy Basic: Exercises, Practice, Solution

## NumPy Basic [59 exercises with solution]

[** An editor is available at the bottom of the page to write and execute the scripts.** Go to the editor]

**1. **Write a Numpy program to get the Numpy version and show the Numpy build configuration.

Click me to see the sample solution

**2.** Write a NumPy program to get help with the add function.

Click me to see the sample solution

**3.** Write a NumPy program to test whether none of the elements of a given array are zero.

Click me to see the sample solution

**4.** Write a NumPy program to test if any of the elements of a given array are non-zero.

Click me to see the sample solution

**5.** Write a NumPy program to test a given array element-wise for finiteness (not infinity or not a number).

Click me to see the sample solution

**6. **Write a NumPy program to test elements-wise for positive or negative infinity.

Click me to see the sample solution

**7.** Write a NumPy program to test element-wise for NaN of a given array.

Click me to see the sample solution

**8.** Write a NumPy program to test element-wise for complex numbers, real numbers in a given array. Also test if a given number is of a scalar type or not.

Click me to see the sample solution

**9.** Write a NumPy program to test whether two arrays are element-wise equal within a tolerance.

Click me to see the sample solution

**10.** Write a NumPy program to create an element-wise comparison (greater, greater_equal, less and less_equal) of two given arrays.

Click me to see the sample solution

**11.** Write a NumPy program to create an element-wise comparison (equal, equal within a tolerance) of two given arrays.

Click me to see the sample solution

**12.** Write a NumPy program to create an array with the values 1, 7, 13, 105 and determine the size of the memory occupied by the array.

Click me to see the sample solution

**13.** Write a NumPy program to create an array of 10 zeros, 10 ones, and 10 fives.

Click me to see the sample solution

**14.** Write a NumPy program to create an array of integers from 30 to 70.

Click me to see the sample solution

**15.**Write a NumPy program to create an array of all even integers from 30 to 70.

Click me to see the sample solution

**16.** Write a NumPy program to create a 3x3 identity matrix.

Click me to see the sample solution

**17.** Write a NumPy program to generate a random number between 0 and 1.

Click me to see the sample solution

**18.** Write a NumPy program to generate an array of 15 random numbers from a standard normal distribution.

Click me to see the sample solution

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

Click me to see the sample solution

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

Click me to see the sample solution

**21.** Write a NumPy program to create a vector of length 10 with values evenly distributed between 5 and 50.

Click me to see the sample solution

**22.** Write a NumPy program to create a vector with values from 0 to 20 and change the sign of the numbers in the range from 9 to 15.

Click me to see the sample solution

**23.** Write a NumPy program to create a vector of length 5 filled with arbitrary integers from 0 to 10.

Click me to see the sample solution

**24.** Write a NumPy program to multiply the values of two given vectors.

Click me to see the sample solution

**25.** Write a NumPy program to create a 3x4 matrix filled with values from 10 to 21.

Click me to see the sample solution

**26. **Write a NumPy program to find the number of rows and columns in a given matrix.

Click me to see the sample solution

**27.** Write a NumPy program to create a 3x3 identity matrix, i.e. the diagonal elements are 1, the rest are 0.

Click me to see the sample solution

**28.** Write a NumPy program to create a 10x10 matrix, in which the elements on the borders will be equal to 1, and inside 0.

Click me to see the sample solution

**29.** Write a NumPy program to create a 5x5 zero matrix with elements on the main diagonal equal to 1, 2, 3, 4, 5.

Click me to see the sample solution

**30**. Write a NumPy program to create a 4x4 matrix in which 0 and 1 are staggered, with zeros on the main diagonal.

Click me to see the sample solution

**31.** Write a NumPy program to create a 3x3x3 array filled with arbitrary values.

Click me to see the sample solution

**32.** Write a NumPy program to compute the sum of all elements, the sum of each column and the sum of each row in a given array.

Click me to see the sample solution

**33.** Write a NumPy program to compute the inner product of two given vectors.

Click me to see the sample solution

**34.** Write a NumPy program to add a vector to each row of a given matrix.

Click me to see the sample solution

**35.** Write a NumPy program to save a given array to a binary file .

Click me to see the sample solution

**36.** Write a NumPy program to save a given array to a binary file.

Click me to see the sample solution

**37.** Write a NumPy program to save a given array to a text file and load it.

Click me to see the sample solution

**38.** Write a NumPy program to convert a given array into bytes, and load it as an array.

Click me to see the sample solution

**39.** Write a NumPy program to convert a given list into an array, then again convert it into a list. Check initial list and final list are equal or not.

Click me to see the sample solution

**40.** Write a NumPy program to compute the x and y coordinates for points on a sine curve and plot the points using matplotlib.

Click me to see the sample solution

**41.** Write a NumPy program to convert numpy dtypes to native Python types

Click me to see the sample solution

**42.** Write a NumPy program to add elements to a matrix. If an element in the matrix is 0, we will not add the element below this element.

Click me to see the sample solution

**43.** Write a NumPy program to find missing data in a given array.

Click me to see the sample solution

**44.** Write a NumPy program to check whether two arrays are equal (element wise) or not.

Click me to see the sample solution

**45.** Write a NumPy program to create a one-dimensional array of single, two and three-digit numbers.

Click me to see the sample solution

**46.** Write a NumPy program to create a two-dimensional array of a specified format.

Click me to see the sample solution

**47.** Write a NumPy program to create a one-dimensional array of forty pseudo-randomly generated values. Select random numbers from a uniform distribution between 0 and 1.

Click me to see the sample solution

**48.** Write a NumPy program to create a two-dimensional array with shape (8,5) of random numbers. Select random numbers from a normal distribution (200,7).

Click me to see the sample solution

**49.** Write a NumPy program to generate a uniform, non-uniform random sample from a given 1-D array with and without replacement.

Click me to see the sample solution

**50.** Write a NumPy program to create a 4x4 array with random values. Create an array from the said array swapping first and last rows.

Click me to see the sample solution

**51.** Write a NumPy program to create a new array of given shape (5,6) and type, filled with zeros.

Click me to see the sample solution

**52.** Write a NumPy program to sort a given array by row and column in ascending order.

Click me to see the sample solution

**53.** Write a NumPy program to extract all numbers from a given array less and greater than a specified number.

Click me to see the sample solution

**54.** Write a NumPy program to replace all numbers in a given array equal, less and greater than a given number.

Click me to see the sample solution

**55.** Write a NumPy program to create an array of equal shape and data type for a given array.

Click me to see the sample solution

**56.** Write a NumPy program to create a three-dimensional array with the shape (3,5,4) and set it to a variable.

Click me to see the sample solution

**57.** Write a NumPy program to create a 4x4 array. Create an array from said array by swapping first and last, second and third columns.

Click me to see the sample solution

**58.** Write a NumPy program to swap rows and columns of a given array in reverse order.

Click me to see the sample solution

**59.** Write a NumPy program to multiply two given arrays of the same size element-by-element.

Click me to see the sample solution

**Python-Numpy Code Editor:**

**More to Come !**

**Do not submit any solution of the above exercises at here, if you want to contribute go to the appropriate exercise page.**

Test your Python skills with w3resource's quiz

**It will be nice if you may share this link in any developer community or anywhere else, from where other developers may find this content. Thanks.**

https://www.w3resource.com/python-exercises/numpy/basic/index.php

**Weekly Trends and Language Statistics**- Weekly Trends and Language Statistics