Question: Can I get a row of a matrix?

Hi, all, I want to know whether I get a row of a matrix. For example, I have a matrix: [ 1 0 0 1] [ 0 1 0 1] M=[ 1 0 1 0] [ 0 0 0 1] and I want to the first row [ 1 0 0 1], how to do this? thanks Gepo
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