Today, we will see how to replace elements with zeros in Python. We will write two programs for that, in the first one, we will see how to replace elements with zeros in a matrix created using lists in Python, and in the second one, we will use NumPy.

## 1. Replace Elements with Zeros in a matrix of List in Python

```
matrix = [[1, 2, 3],
[4, 5, 6],
[7, 8, 9]]
for i in range(len(matrix)):
for j in range(len(matrix)):
matrix[i][j] = 0
print(matrix)
```

### Output:

## 2. Replace Elements with Zeros in a matrix of List in Python

```
import numpy as np
matrix = np.array([[1, 2, 3],
[4, 5, 6],
[7, 8, 9]])
for i in range(len(matrix)):
for j in range(len(matrix)):
matrix[i][j] = 0
print(matrix)
```

### Output:

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