The name of the symbol is "pound sign" or "number sign". It is also known as an "octothorpe" or "hash symbol".
An individual one can be called a character.
symbol of number= #
The element with atomic number 101 is called "Mendelevium" (Md).
The '&' symbol is called ampersand.
The "&" symbol is called an ampersand.
If you mean the symbol &, it is called an ampersand.
The "and" symbol is called an ampersand.
digit
An unknown number represented by a letter or symbol is a variable.
it is called the power
year