While entering a numeric literal constant you need not enter a . . . . . . . .

A special character is a character that is not a number or a letter. For example, the period (.), the comma (,), and the dollar sign ($) are all special characters.

When entering a numeric literal constant, you do not need to enter any special characters. For example, the following are all valid numeric literal constants:

• 123
• 456.78
• 0.001

The following are not valid numeric literal constants because they contain special characters:

• 123.
• 456,78
• $0.001

I hope this helps! Let me know if you have any other questions.