explain th datatable

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C#

tablename User

Id           int                   
Email         varchar(500)
Password       varchar(500)
Name            varchar(500)

DATA IN TABLE IS

Id Email          Password Name 
1  ali@yahoo.com   1234     ali
2  usman@yahoo.com  1234    usman

i ask you about simply how datatable working
is

Label1.text=datatable.Rows[0]["Name"].Tostring();

for Row ali@yahoo.com 1234 ali
and Label1.Text=datable.Rows[1]["Name"].Tostring(); is for row usman@yahoo.com 1234 usman

1 ali@yahoo.com 1234 ali          // is this is row 0?

2   usman@yahoo.com  1234  usman      // is  this is row1?