freeCodeCamp/curriculum/challenges/english/08-data-analysis-with-python/numpy/accessing-and-changing-elements,-rows,-columns.md

id	title	challengeType	videoId	dashedName
5e9a0a8e09c5df3cc3600ed4	Accessing and Changing Elements, Rows, Columns	11	v-7Y7koJ_N0	accessing-and-changing-elements-rows-columns

--question--

--text--

What code would change the values in the 3rd column of both of the following Numpy arrays to 20?

a = np.array([[1, 2, 3, 4, 5], [6, 7, 8, 9, 10]])

# Output:
# [[ 1  2  20  4  5]
# [ 6  7 20  9 10]]

--answers--

a[:, 3] = 20

---

a[2, :] = 20

---

a[:, 2] = 20

---

a[1, 2] = 20

--video-solution--

3