Goal: Understanding different types that can ztore integer numbers and declaring the correct one depending on the type

Assignment: Declare a variable called bigNumber, that can hold a very high value, for example, $10,000,000,000,000,000,000(10$ to the $19$th power$).$ Then, assign $30$ to this variable.

Note: You must write only the statement necessary to complete the task, and include a semicolon if necessary. Keep in mind the correct syntax and formatting of the C$++$ language while writing the code.