They are called operators, and they perform some operation on the values associated with them (known as operands). For example, 1 * 2 means to multiply (operator *) 1 and 2 (the operands) and return the product.
You should seek more intensive programming education before attempting to implement a save option. Your question is very basic and indicates that you are still learning the basics. Keep at it! The greatest writers of all time once had to spend time learning their ABC’s and how to sound out words.
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solved Using Symbols while coding