Variables are classified according to their data type, which determines the kind of information that may be stored in them. Integer variables only hold whole numbers. This program has variables of several of the integer types. Our checking account balance is -20. Exactly 184086 days ago Columbus stood on this spot.
Strings always have a null terminator at the end.
This marks the end of the string. Escape sequences are always stored internally as a single character. Characters occupy a single byte of memory. Strings are consecutive sequences of characters and can occupy several bytes of memory. Strings always have a null terminator at the end.