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Like all modern applications Excel has the capability to show things in various colours, so it can display characters in many colours.
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excel characters are symbols like @ instead of using the word at.
The * and ? and ~ are the three wildcard symbols in Excel.
A cell can hold up to 32,767 characters, of which only 1024 can be seen in the cell.
in excel workbook these are symbols.
A possible answer is text, numbers, and special characters.
In Excel, a number can contain be characters
Text to column
8.43 characters