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Examples :
- if you need to keep track of which floor you are in, where:
- you may have negative floors (underground);
- you don't expect to go more than 32767 floors...
- you can declare a variable "floor":
- int floor;
- if you want to keep track of how many students are enrolled in school and:
- you do not have a negative number there;
- there is a chance you have more than 32000 but not more than
64000;
- you can declare a variable "students":
- unsigned int number_of_students;
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