CVariable Names (Identifiers)
C Variable Names
All Cvariables must beidentified withunique names.
These unique names are calledidentifiers.
Identifiers can be short names (like x and y) or more descriptive names (age, sum, totalVolume).
Note: It is recommended to use descriptive names in order to create understandable and maintainable code:
Example
// Good variable name
int minutesPerHour = 60;
// OK, but not so easy to understand whatm actually is
int m = 60;
Try it Yourself »int minutesPerHour = 60;
// OK, but not so easy to understand whatm actually is
int m = 60;
The general rulesfor naming variables are:
- Names can contain letters, digits and underscores
- Names must begin with a letter or an underscore (_)
- Names are case-sensitive (
myVarandmyvarare different variables) - Names cannot contain whitespaces or special characters like !, #, %, etc.
- Reserved words (such as
int) cannot be used as names
