# Take Matrix input from user in Python

Matrix is nothing but a rectangular arrangement of data or numbers. In other words, it is a rectangular array of data or numbers. The horizontal entries in a matrix are called as ‘rows’ while the vertical entries are called as ‘columns’. If a matrix has r number of rows and c number of columns then the order of matrix is given by r x c. Each entries in a matrix can be integer values, or floating values, or even it can be complex numbers.

Examples:

```// 3 x 4 matrix
1 2 3 4
M =  4 5 6 7
6 7 8 9

// 2 x 3 matrix in Python
A = ( [ 2, 5, 7 ],
[ 4, 7, 9 ] )

// 3 x 4 matrix in Python where entries are floating numbers
B = ( [ 1.0, 3.5, 5.4, 7.9 ],
[ 9.0, 2.5, 4.2, 3.6 ],
[ 1.5, 3.2, 1.6, 6.5 ] )```

In Python, we can take a user input matrix in different ways. Some of the methods for user input matrix in Python are shown below:

Code #1:

 `# A basic code for matrix input from user ` ` `  `R ``=` `int``(``input``(``"Enter the number of rows:"``)) ` `C ``=` `int``(``input``(``"Enter the number of columns:"``)) ` ` `  `# Initialize matrix ` `matrix ``=` `[] ` `print``(``"Enter the entries rowwise:"``) ` ` `  `# For user input ` `for` `i ``in` `range``(R):          ``# A for loop for row entries ` `    ``a ``=``[] ` `    ``for` `j ``in` `range``(C):      ``# A for loop for column entries ` `         ``a.append(``int``(``input``())) ` `    ``matrix.append(a) ` ` `  `# For printing the matrix ` `for` `i ``in` `range``(R): ` `    ``for` `j ``in` `range``(C): ` `        ``print``(matrix[i][j], end ``=` `" "``) ` `    ``print``() `

Output:

```Enter the number of rows:2
Enter the number of columns:3
Enter the entries rowwise:
1
2
3
4
5
6

1 2 3
4 5 6
```

One liner:

 `# one-liner logic to take input for rows and columns ` `mat ``=` `[[``int``(``input``()) ``for` `x ``in` `range` `(C)] ``for` `y ``in` `range``(R)] `

Code #2: Using `map()` function and `Numpy`.

In Python, there exists a popular library called NumPy. This library is a fundamental library for any scientific computation. It is also used for multidimensional arrays and as we know matrix is a rectangular array, we will use this library for user input matrix.

 `import` `numpy as np ` ` `  `R ``=` `int``(``input``(``"Enter the number of rows:"``)) ` `C ``=` `int``(``input``(``"Enter the number of columns:"``)) ` ` `  ` `  `print``(``"Enter the entries in a single line (separated by space): "``) ` ` `  `# User input of entries in a  ` `# single line separated by space ` `entries ``=` `list``(``map``(``int``, ``input``().split())) ` ` `  `# For printing the matrix ` `matrix ``=` `np.array(entries).reshape(R, C) ` `print``(matrix) `

Output:

```Enter the number of rows:2
Enter the number of columns:2
Enter the entries in a single line separated by space: 1 2 3 1
[[1 2]
[3 1]]```

My Personal Notes arrow_drop_up Possess good Mathematical and Statistical Foundation Data Science Enthusiast

If you like GeeksforGeeks and would like to contribute, you can also write an article using contribute.geeksforgeeks.org or mail your article to contribute@geeksforgeeks.org. See your article appearing on the GeeksforGeeks main page and help other Geeks.

Please Improve this article if you find anything incorrect by clicking on the "Improve Article" button below.

Improved By : mkumarchaudhary06

Article Tags :

8

Please write to us at contribute@geeksforgeeks.org to report any issue with the above content.