# Python | Numpy matrix.trace()

With the help of `Numpy matrix.trace()` method, we can find the sum of all the elements of diagonal of a matrix by using the `matrix.trace()` method.

Syntax : `matrix.trace()`
Return : Return sum of a diagonal elements of a matrix

Example #1 :
In this example we can see that by using `matrix.trace()` method can help us to find the sum of all the elements of a diagonal of given matrix.

 `# import the important module in python ` `import` `numpy as np ` `             `  `# make matrix with numpy ` `gfg ``=` `np.matrix(``'[4, 1; 12, 3]'``) ` `             `  `# applying matrix.trace() method ` `geek ``=` `gfg.trace() ` `   `  `print``(geek) `

Output:

```[[7]]
```

Example #2 :

 `# import the important module in python ` `import` `numpy as np ` `             `  `# make matrix with numpy ` `gfg ``=` `np.matrix(``'[4, 1, 9; 12, 3, 1; 4, 5, 6]'``) ` `             `  `# applying matrix.trace() method ` `geek ``=` `gfg.trace() ` `   `  `print``(geek) `

Output:

```[[13]]
```

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