How int row is define for rows of the programing is it inbuilt or we take any variable in place of it

#1

is this necessary to take int row as variable for rows of the programing what if we take another variable as i,j instead of it and how system know that row variable is for rows .

#2

hi @rahulguptaamezing_875983ae6b6eec5f use anything doesnt matter, u make it know by keeping i<rows or j<cols