Data type, variables and constants

Data type, variables and constants

1. Data Type

   • It is a classification of the type of data/value a variable or object can have in programming.
     • Example
       • STRING: used for Alphanumeric characters
         • Margaret Rouse. (2016). Data Type. 8 de agosto de 2017, de Search Microservices Sitio web: http://searchmicroservices.techtarget.com/definition/data-type
         • Computer Hope. (2017). Data Type. 8 de agosto de 2017, de Computer Hope Sitio web: https://www.computerhope.com/jargon/d/datatype.htm

2. Variables

   • It is a storage area to hold data that has to have a unique name which, as the value too, can change. That´s why it is called variable.
     • Example
       • int x = 1; // x holds the value 1 x = 2; // now x holds the value 2
         • Visual Studio. (2008). Variables and Constants. 8 de agosto de 2017, de Microsoft Sitio web: https://msdn.microsoft.com/en-us/library/wew5ytx4(v=vs.90).aspx

3. Constants

   • It is a value that cannot be changed or altered after assigning it when programming.
     • Example
       • Const double PI = 3.14
         • Learn C. (s.f). C Programming Constants and Variables. 8 de agosto de 2017, de Programiz Sitio web: https://www.programiz.com/c-programming/c-variables-constants