cell reference or cell address
identifier is a letter , digit.
A N D is not an identifier as it has spaces in between each letter. A valid identifier DOES NOT have space in it.
letter -> [a-zA-Z] digit -> [0-9] identifier -> letter|_(letter|digit|_)
A cell is a box on a spreadsheet formed in a grid where a particular column and row intersect. Each cell has an address which is made from its column letter(s) and row number. So the cell where column K meets row 49 has the address K49. The cell where column BD meets row 2019 has the address BD2019.A cell is a box on a spreadsheet formed in a grid where a particular column and row intersect. Each cell has an address which is made from its column letter(s) and row number. So the cell where column K meets row 49 has the address K49. The cell where column BD meets row 2019 has the address BD2019.A cell is a box on a spreadsheet formed in a grid where a particular column and row intersect. Each cell has an address which is made from its column letter(s) and row number. So the cell where column K meets row 49 has the address K49. The cell where column BD meets row 2019 has the address BD2019.A cell is a box on a spreadsheet formed in a grid where a particular column and row intersect. Each cell has an address which is made from its column letter(s) and row number. So the cell where column K meets row 49 has the address K49. The cell where column BD meets row 2019 has the address BD2019.A cell is a box on a spreadsheet formed in a grid where a particular column and row intersect. Each cell has an address which is made from its column letter(s) and row number. So the cell where column K meets row 49 has the address K49. The cell where column BD meets row 2019 has the address BD2019.A cell is a box on a spreadsheet formed in a grid where a particular column and row intersect. Each cell has an address which is made from its column letter(s) and row number. So the cell where column K meets row 49 has the address K49. The cell where column BD meets row 2019 has the address BD2019.A cell is a box on a spreadsheet formed in a grid where a particular column and row intersect. Each cell has an address which is made from its column letter(s) and row number. So the cell where column K meets row 49 has the address K49. The cell where column BD meets row 2019 has the address BD2019.A cell is a box on a spreadsheet formed in a grid where a particular column and row intersect. Each cell has an address which is made from its column letter(s) and row number. So the cell where column K meets row 49 has the address K49. The cell where column BD meets row 2019 has the address BD2019.A cell is a box on a spreadsheet formed in a grid where a particular column and row intersect. Each cell has an address which is made from its column letter(s) and row number. So the cell where column K meets row 49 has the address K49. The cell where column BD meets row 2019 has the address BD2019.A cell is a box on a spreadsheet formed in a grid where a particular column and row intersect. Each cell has an address which is made from its column letter(s) and row number. So the cell where column K meets row 49 has the address K49. The cell where column BD meets row 2019 has the address BD2019.A cell is a box on a spreadsheet formed in a grid where a particular column and row intersect. Each cell has an address which is made from its column letter(s) and row number. So the cell where column K meets row 49 has the address K49. The cell where column BD meets row 2019 has the address BD2019.
name, code, mark
The column letter or letters are at the top of each column. In a cell reference the column letter or letter comes before the row number, giving cell references like these: C5 AK34 D3890
Column heading
Letter at the top of the column.
Yes, "Y" can be used as a vowel, and thus can be a combining vowel form. Normally it is substituted for the letter "I".
Just click the column header (where the column letter is).
If you mean a variable name, then no -- it must begin with a letter or an underscore, but any combination of letters, digits and underscores may follow. If you mean a variable that stores an identifier, then yes -- so long as the identifier is a string type.
If you're asking how to create an identifier that begins with a number, then the answer is you cannot. All identifiers must begin with a letter or an underscore. If we allowed leading numbers, the compiler wouldn't be able to distinguish whether 42 was an identifier or a numeric value. Whereas _42 is clearly an identifier.